主流算法：
1.搜索 //回溯
2.DP（动态规划）
3.贪心
4.图论 //Dijkstra、最小生成树、网络流
5.数论 //解模线性方程
6.计算几何 //凸壳、同等安置矩形的并的面积与周长
7.组合数学 //Polya定理
8.模拟
9.数据结构 //并查集、堆
10.博弈论
//表示举例
非主流算法：
1.送分题
2.构造
3.高精度
4.几何
5.排序
6.日期/时间处理 （这类题目相当多的）
7.数学方法
8.枚举
9.递推
10.递归
11.分治
说明：
显然“送分题”不是一种算法。但是ACM竞赛中经常有一些很简单很简单的题目，具体涉及内容繁杂，难以归类，干脆就管他们叫送分题。
几何不同于计算几何，计算几何或者叫S计算几何，以Shamos在1975年发表的一篇论文为诞生标志。其实两者有很大的不同。
部分题目分类统计：
网络流：
最大流：
1087 a plug for UNIX
1149 PIGS
1273 drainage ditches
1274 the perfect stall
1325 machine schedule
1459 power network
2239 selecting courses
最小费用最大流：
2195 going home ?2400 supervisor, supervisee
压缩存储的DP
1038 bugs integrated inc 1185 炮兵阵地 2430 lazy cow
最长公共子串（LCS）：
1080 human gene functions 1159 palindrome
1458 common subsequence 2192 zipper
凸包
1113 wall 2187 beauty contest
POJ各题算法
凡例：
“/”表示“或者”。
“->”表示“具体是”，“细分为”。
1000 A+B Problem 送分题 49% 2005-5-7
1001 Exponentiation 高精度 85% 2005-5-7
1002 487-3279 n/a 90% 2005-5-7
1003 Hangover 送分题 62% 2005-5-7
1004 Financial Management 送分题 61% 2005-5-7
1005 I Think I Need a Houseboat 几何 68% 2005-5-7
1006 Biorhythms 送分题 80% 2005-5-7
1007 DNA Sorting 送分题 66% 2005-5-7
1008 Maya Calendar 日期处理 74% 2005-5-7
1009 Edge Detection 84% 2005-5-2
1010 STAMPS 搜索＋DP 83% 2005-5-2
1011 Sticks 搜索 85% 2005-5-7
1012 Joseph 模拟/数学方法 62% 2005-5-7
1013 Counterfeit Dollar n/a 72% 2005-5-7
1014 Dividing 数论/DP?/组合数学->母函数? 82% 2005-5-7
1015 Jury Compromise DP 81% 2005-5-5
1016 Numbers That Count 送分题 69% 2005-5-6
1017 Packets 贪心 72% 2005-5-7
1018 Communication System 贪心 74% 2005-5-3
1019 Number Sequence 送分题 80% 2005-5-6
1020 Anniversary Cake 搜索 87% 2005-5-6
1021 2D-Nim 69% 2005-5-3
1022 Packing Unit 4D Cubes 63% 2005-4-26
1023 The Fun Number System 数论 77% 2005-5-1
1024 Tester Program 73% 2005-3-17
1025 Department模拟 66% 2005-4-22
1026 Cipher组合数学 84% 2005-5-6
1027 The Same Game模拟 67% 2005-5-6
1028 Web Navigation送分题 75% 2005-5-7
1029 False coin 66% 2005-5-7
1030 Rating 83% 2005-5-7
1031 Fence计算几何 74% 2005-5-7
1032 Parliament 66% 2005-5-4
1033 Defragment 70% 2005-5-1
1034 The dog task计算几何 72% 2005-5-6
1035 Spell checker 76% 2005-5-7
1036 Gangsters 73% 2005-5-1
1037 A decorative fence DP/组合数学 81% 2005-4-30
1038 Bugs Integrated, Inc. 90% 2005-5-4
1039 Pipe几何 68% 2005-5-2
1040 Transportation 69% 2005-5-4
1041 John‘s trip 83% 2005-5-2
1042 Gone Fishing贪心/DP 81% 2005-5-3
1043 What‘s In A Name? 75% 2005-5-2
1044 Date bugs 70% 2005-5-2
1045 Bode Plot送分题(用物理知识) 24% 2005-5-2
1046 Color Me Less送分题 64% 2005-5-7
1047 Round and Round We Go高精度 63% 2005-5-6
1048 Follow My Logic模拟 76% 2005-5-6
1049 Microprocessor Simulation模拟 73% 2005-5-6
1050 To the Max DP 60% 2005-5-7
1051 P,MTHBGWB 55% 2005-5-7
1052 Plato‘s Blocks n/a类似ceoi99 matty block 67% 2005-5-1
1053 Set Me送分题 52% 2005-5-7
1054 The Troublesome Frog搜索 81% 2005-5-2
1055 BULK MAILING 75% 2005-5-5
1056 IMMEDIATE DECODABILITY 62% 2005-5-6
1057 FILE MAPPING 63% 2005-4-30
1058 The Gourmet Club 85% 2005-5-4
1059 Chutes and Ladders 40% 2005-5-5
1060 Modular multiplication of polynomials高精度 59% 2005-5-4
1061 青蛙的约会 数论 92% 2005-5-7
1062 昂贵的聘礼 DP 84% 2005-5-1
1063 Flip and Shift 53% 2005-4-30
1064 Cable master DP/二分查找 77% 2005-5-2
1065 Wooden Sticks DP 59% 2005-5-3
1066 Treasure Hunt 61% 2005-4-21
1067 取石子游戏 博弈论 86% 2005-5-7
1068 Parencodings送分题 40% 2005-5-7
1069 The Bermuda Triangle搜索 67% 2004-12-10
1070 Deformed Wheel几何 79% 2004-12-10
1071 Illusive Chase送分题 50% 2005-5-1
1072 Puzzle Out搜索 90% 2005-4-25
1073 The Willy Memorial Program模拟 77% 2005-3-31
1074 Parallel Expectations DP 63% 2005-4-9
1075 University Entrance Examination模拟 63% 2005-5-1
1076 Bowl 90% 2005-5-1
1077 Eight 82% 2005-5-6
1078 Gizilch 60% 2005-4-14
1079 Ratio 69% 2005-5-4
1080 Human Gene Functions DP->LCS变形 39% 2005-5-4
1081 You Who? 83% 2004-12-4
1082 Calendar Game博弈论 57% 2005-5-5
1083 Moving Tables 58% 2005-5-3
1084 Square Destroyer搜索？ 62% 2005-5-6
1085 Triangle War博弈论 71% 2005-3-23
1086 Unscrambling Images模拟? 52% 2005-2-24
1087 A Plug for UNIX图论->最大流 81% 2005-5-6
1088 滑雪 DFS/DP 81% 2005-5-7
1089 Intervals 80% 2005-5-1
1090 Chain ->格雷码和二进制码的转换 83% 2005-5-6
1091 跳蚤 数论 83% 2005-5-4
1092 Farmland几何 63% 2005-4-23
1093 Formatting Text DP 87% 2005-5-1
1094 Sorting It All Out图论->拓扑排序 76% 2005-5-7
1095 Trees Made to Order组合数学 47% 2005-5-1
1096 Space Station Shielding送分题 45% 2005-5-1
1097 Roads Scholar图论 63% 2005-5-1
1098 Robots模拟 58% 2005-2-24
1099 Square Ice送分题 65% 2005-5-5
1100 Dreisam Equations搜索 90% 2005-5-6
1101 The Game搜索->BFS 74% 2005-5-6
1102 LC-Display送分题 62% 2005-5-7
1103 Maze模拟 64% 2005-5-6
1104 Robbery递推 61% 2005-5-6
1105 S-Trees n/a 38% 2005-5-7
1106 Transmitters几何 39% 2005-5-4
1107 W‘s Cipher送分题 49% 2005-5-7
1108 Split Windows n/a 25% 2004-12-14
1109 Index Generation n/a 50% 2005-1-18
1110 Double Vision搜索 44% 2005-5-1
1111 Image Perimeters搜索 39% 2005-5-7
1112 Team Them Up! DP 65% 2005-5-2
1113 Wall计算几何->convex hull 76% 2005-5-5
1114 Chemical Reactions 52% 2005-5-3
1115 Statistical Trouble 79% 2005-4-16
1116 Library 68% 2005-4-5
1117 Pairs of Integers n/a 75% 2005-5-6
1118 Lining Up 79% 2005-5-7
1119 Start Up the Startup送分题 82% 2005-4-28
1120 A New Growth Industry模拟 54% 2005-5-2
1121 Algernon‘s Noxious Emissions 33% 2005-4-23
1122 FDNY to the Rescue!图论->Dijkstra 81% 2005-4-23
1123 For the Porsche 65% 2005-4-7
1124 Oh, Those Achin‘ Feet 75% 2005-4-26
1125 Stockbroker Grapevine图论->Dijkstra 35% 2005-4-29
1126 Simply Syntax 73% 2005-5-6
1127 Jack Straws 61% 2005-4-29
1128 Frame Stacking搜索 55% 2005-5-1
1129 Channel Allocation搜索（图的最大独立集） 37% 2005-5-7
1130 Alien Security 55% 2005-5-6
1131 Octal Fractions高精度 46% 2005-5-7
1132 Border 42% 2005-4-29
1133 Stars 74% 2005-5-1
1134 Hexagon 46% 2005-2-24
1135 Domino Effect图论->Dijkstra 56% 2005-4-27
1136 Pendulum 68% 2005-4-10
1137 The New Villa搜索->BFS 74% 2005-4-29
1138 Ships 70% 2005-3-26
1139 Cat and Mouse 74% 2005-4-16
1140 Expanding Fractions 71% 2005-5-7
1141 Brackets Sequence DP 76% 2005-5-7
1142 Smith Numbers搜索 64% 2005-5-7
1143 Number Game博弈论 80% 2005-4-17
1144 Network 66% 2005-5-6
1145 Tree Summing 77% 2005-5-4
1146 ID Codes 44% 2005-5-5
1147 Binary codes构造 71% 2005-5-7
1148 Utopia Divided构造 69% 2005-5-5
1149 PIGS图论->网络流 74% 2005-5-7
1150 The Last Non-zero Digit 88% 2005-5-3
1151 Atlantis计算几何->同等安置矩形的并的面积->离散化 66% 2005-5-6
1152 An Easy Problem!数论 87% 2005-5-6
1153 SAFE 90% 2005-4-11
1154 LETTERS 58% 2005-4-28
1155 TELE 80% 2005-5-5
1156 A STRIP OF LAND 93% 2005-5-6
1157 LITTLE SHOP OF FLOWERS DP 58% 2005-5-7
1158 TRAFFIC LIGHTS图论->Dijkstra变形 81% 2005-5-5
1159 Palindrome DP->LCS 82% 2005-5-7
1160 Post Office DP 75% 2005-5-4
1161 Walls图论 63% 2005-4-27
1162 Building with Blocks搜索 85% 2005-4-27
1163 The Triangle DP 45% 2005-5-7
1164 The Castle 50% 2005-5-3
1165 The Primes 65% 2005-5-6
1166 The Clocks 71% 2005-5-6
1167 The Buses 73% 2005-4-4
1168 The Circle 80% 2005-3-12
1169 Packing Rectangles 25% 2005-5-3
1170 Shopping Offers DP 60% 2005-5-3
1171 Letter Game 85% 2005-5-7
1172 Street Race 82% 2005-4-29
1173 Bar Codes 81% 2005-4-9
1174 Contact 76% 2005-5-7
1175 Starry Night 52% 2005-5-4
1176 Party Lamps 77% 2005-5-3
1177 Picture计算几何->同等安置矩形的并的周长->线段树 53% 2005-5-2
1178 Camelot 64% 2005-5-2
1179 Polygon DP 60% 2005-5-3
1180 Batch Scheduling DP 66% 2005-4-19
1181 Bus Terminals 67% 2005-4-19
1182 食物链 数据结构->并查集 84% 2005-5-6
1183 反正切函数的应用 搜索 73% 2005-5-5
1184 聪明的打字员 搜索 76% 2005-5-4
1185 炮兵阵地 DP->数据压缩 82% 2005-5-4
1186 方程的解数 87% 2005-5-6
1187 陨石的秘密 DP（BalkanOI99 Par的拓展） 81% 2005-5-4
1188 Gleaming the Cubes 57% 2005-3-27
1189 钉子和小球 递推? 72% 2005-5-5
1190 生日蛋糕 搜索/DP 74% 2005-5-4
1191 棋盘分割 DP 65% 2005-5-7
1192 最优连通子集 图论->无负权回路的有向图的最长路->BellmanFord 63% 2005-5-6
1193 内存分配 模拟 82% 2005-4-27
1194 HIDDEN CODES 搜索+DP 84% 2005-5-4
1195 Mobile phones 79% 2005-5-7
1196 Twofive 47% 2005-4-19
1197 Depot数据结构->Young Tableau 67% 2005-4-15
1198 Solitaire 77% 2005-5-7
1199 Left labyrinths 93% 2005-4-30
Volume 3
1200 Crazy Search 91% 2005-5-7
1201 Intervals贪心/图论->最长路->差分约束系统 77% 2005-4-15
1202 Family高精度 87% 2005-3-30
1203 Timetable 74% 2005-2-24
1204 Word Puzzles 95% 2005-4-3
1205 Water Treatment Plants 53% 2005-4-19
1206 Servers 48% 2005-2-24
1207 The 3n + 1 problem n/a 77% 2005-5-7
1208 The Blocks Problem 79% 2005-5-5
1209 Calendar日期处理 78% 2005-2-24
1210 City Directions 78% 2005-4-29
1211 Traffic Lights 62% 2005-4-30
1212 Eeny Meeny 46% 2005-3-12
1213 Roman Numerals 30% 2005-5-5
1214 "Accordian" Patience 45% 2005-4-16
1215 Gondwanaland Telecom 70% 2005-5-7
1216 Simulation Wizardry 16% 2005-4-7
1217 FOUR QUARTERS递推 65% 2005-5-2
1218 THE DRUNK JAILER送分题 29% 2005-5-6
1219 L-I-N-G-O: LINGO 85% 2005-5-2
1220 NUMBER BASE CONVERSION 65% 2005-5-7
1221 UNIMODAL PALINDROMIC DECOMPOSITIONS 69% 2005-5-5
1222 EXTENDED LIGHTS OUT 23% 2005-5-2
1223 DEHUFF 72% 2005-3-12
1224 PICTURE PUZZLE 76% 2005-3-12
1225 STRICTLY INSCRIBED SIMILAR TRIANGLES 67% 2005-3-12
1226 Substrings 55% 2005-5-7
1227 RoboContest 76% 2005-4-30
1228 Grandpa‘s Estate 82% 2005-3-9
1229 Wild Domains 85% 2005-2-15
1230 Pass-Muraille 81% 2005-5-6
1231 The Alphabet Game 64% 2005-4-16
1232 Microfiches 74% 2005-5-3
1233 Street Crossing搜索->BFS 75% 2005-4-15
1234 Ball Toss 47% 2005-5-6
1235 Galactic Breakup 78% 2005-5-4
1236 Network of Schools 52% 2005-4-27
1237 The Postal Worker Rings Once 35% 2005-4-28
1238 Arbitrage 85% 2005-4-22
1239 Increasing Sequences 77% 2005-5-7
1240 Pre-Post-erous! 40% 2005-5-7
1241 Knockout Tournament 42% 2005-5-7
1242 Plugged In 43% 2005-3-31
1243 One Person 31% 2005-5-6
1244 Slots of Fun 49% 2005-5-7
1245 Programmer, Rank Thyself送分题 45% 2005-4-26
1246 Hilbert Curve Intersections 72% 2005-3-31
1247 Magnificent Meatballs送分题 28% 2005-5-7
1248 Safecracker搜索 34% 2005-4-15
1249 Oil Pipeline 72% 2005-3-31
1250 Tanning Salon送分题 39% 2005-5-7
1251 Jungle Roads图论->最小生成树 45% 2005-4-28
1252 Euro Efficiency 63% 2005-4-26
1253 Markov Trains 74% 2005-3-31
1254 Hansel and Grethel 50% 2005-5-7
1255 Floors 57% 2005-3-31
1256 Anagram 81% 2005-5-6
1257 Cross-stitch. 74% 2005-5-4
1258 Agri-Net 62% 2005-5-7
1259 The Picnic 50% 2005-3-31
1260 Pearls 66% 2005-4-26
1261 Huffman Trees 90% 2004-12-10
1262 Input 60% 2005-4-11
1263 Reflections 47% 2005-4-17
1264 SCUD Busters 57% 2005-5-3
1265 Area 53% 2005-4-29
1266 Cover an Arc. 83% 2005-5-7
1267 Fence 78% 2005-4-19
1268 Forests 94% 2005-4-22
1269 Intersecting Lines 57% 2005-5-7
1270 Following Orders 58% 2005-5-7
1271 Nice Milk计算几何 81% 2005-3-31
1272 Synchronous Design 87% 2005-2-24
1273 Drainage Ditches图论->最大流 66% 2005-5-7
1274 The Perfect Stall图论->二分图的最大匹配 80% 2005-4-29
1275 Cashier Employment图论->差分约束系统->无负权回路的有向图的最长路
->Bellman-Ford 75% 2005-4-25
1276 Cash Machine 76% 2005-4-22
1277 Beer Land 63% 2005-5-2
1278 BOAT 71% 2005-3-31
1279 Art Gallery 37% 2005-4-7
1280 Game递推 46% 2005-4-14
1281 MANAGER模拟 77% 2005-4-16
1282 庆典的日期 92% 2005-5-6
1283 Moving Computer 65% 2005-5-4
1284 Primitive Roots 64% 2005-4-9
1285 Combinations, Once Again 78% 2005-4-12
1286 Necklace of Beads组合数学->Polya定理 66% 2005-4-28
1287 Networking 42% 2005-4-22
1288 Sly Number数论->解模线性方程组 80% 2005-3-16
1289 The Cat in the Hat 78% 2005-5-2
1290 Grandpa‘s Rubik Cube 28% 2005-4-15
1291 This Sentence is False 58% 2005-3-31
1292 Will Indiana Jones Get There? 70% 2005-3-31
1293 Duty Free Shop DP 89% 2005-5-6
1294 Not Too Convex Hull 75% 2005-3-31
1295 I hate SPAM, but some people love it 38% 2005-4-30
1296 Noise Effect 53% 2005-3-31
1297 Supermarket 82% 2005-4-29
1298 The Hardest Problem Ever送分题 37% 2005-5-7
1299 Polar Explorer 65% 2005-5-4
1300 Door Man 58% 2005-4-10
1301 The Umbrella Problem: 2054 45% 2005-4-1
1302 Blue Gene, Jr. 23% 2005-5-7
1303 Byte Me! 60% 2005-5-5
1304 World‘s Worst Bus Schedule 52% 2005-4-2
1305 Fermat vs. Pythagoras 47% 2005-5-3
1306 Combinations 45% 2005-5-7
1307 Mapping the Route 45% 2005-4-28
1308 Is It A Tree? 75% 2005-4-28
1309 Coconuts, Revisited 64% 2005-5-3
1310 Nonstop Travel 69% 2005-4-28
1311 Doing Windows 76% 2005-3-24
1312 Numerically Speaking 30% 2005-4-28
1313 Booklet Printing 46% 2005-4-27
1314 Finding Rectangles 63% 2005-4-26
1315 Don‘t Get Rooked 28% 2005-5-4
1316 Self Numbers递推 同Humble Number一样 48% 2005-5-7
1317 Do the Untwist 33% 2005-5-6
1318 Word Amalgamation 39% 2005-5-6
1319 Pipe Fitters 36% 2005-4-16
1320 Street Numbers 50% 2005-5-5
1321 棋盘问题 59% 2005-4-27
1322 Chocolate递推/组合数学 75% 2005-5-1
1323 Game Prediction贪心 53% 2005-5-7
1324 Holedox MovingBFS+压缩储存 79% 2005-5-7
1325 Machine Schedule图论->二分图的最大匹配 62% 2005-5-6
1326 Mileage Bank送分题 67% 2005-5-7
1327 Moving Object Recognition模拟? 53% 2005-5-6
1328 Radar Installation贪心（差分约束系统的特例） 80% 2005-5-7
1329 Circle Through Three Points 66% 2005-5-5
1330 Nearest Common Ancestors 52% 2005-5-6
1331 Multiply 47% 2005-5-7
1332 Finding Liars 52% 2005-4-2
1333 Christmas Gifts 44% 2004-12-10
1334 Two Mountaineers 78% 2005-4-15
1335 Digital Onion 70% 2004-12-10
1336 The K-League 68% 2005-4-28
1337 A Lazy Worker 46% 2005-4-6
1338 Ugly Numbers递推(有O(n)算法) 70% 2005-5-7
1339 poker card game 76% 2005-4-7
1340 The Longest Detour Problem 75% 2004-12-10
1341 The Strongest Subchains 86% 2005-2-3
1342 Tag Trees 52% 2004-12-10
1343 Rooted Trees Isomorphism 88% 2004-12-10
1344 Tree Size Problem 69% 2004-12-4
1345 Address Recovery 50% 2005-3-27
1346 Board of Directors Meeting 60% 2004-12-10
1347 Triangle 62% 2005-3-31
1348 Computing 81% 2005-4-24
1349 Coding of Permutations 74% 2005-4-7
1350 Cabric Number Problem 73% 2005-5-5
1351 Number of Locks 58% 2005-3-12
1352 Quantity of White Mice 83% 2005-4-27
1353 Color Change of Go Game Pieces 54% 2005-4-27
1354 Placement of Keys 54% 2005-5-7
1355 Selecting the Optimal Teaching Fiends 92% 2005-2-10
1356 Grandpa‘s Other Estate 55% 2005-4-27
1357 Afshung Pizza Delivery 30% 2005-4-16
1358 Housing Complexes 59% 2005-3-31
1359 Spacecraft Malfunction 60% 2005-3-17
1360 Blue x Red = Bang 73% 2005-5-4
1361 JaWs 86% 2004-12-10
1362 Skew Binary 48% 2005-5-2
1363 Rails 78% 2005-5-3
1364 King图论->无负权回路的有向图的最长路->BellmanFord 38% 2005-3-31
1365 Prime Land 45% 2005-4-27
1366 Word 79% 2005-4-27
1367 Time 56% 2005-4-27
1368 Puzzle 87% 2005-3-31
1369 Append 75% 2005-3-29
1370 Gossiping(数论->模线性方程有无解的判断)+(图论->DFS) 56% 2005-5-3
1371 Tin Cutter 79% 2005-3-22
1372 FORCAL 60% 2005-3-30
1373 L-system 95% 2005-4-16
1374 Crosswords 62% 2005-4-17
1375 Intervals几何 64% 2005-4-15
1376 Robot 67% 2005-4-10
1377 Good Approximation Problem 52% 2005-4-27
1378 Power Cable Problem 64% 2005-2-20
1379 Run Away计算几何-> 83% 2004-12-10
1380 Equipment Box几何 80% 2005-5-6
1381 Secret Code 72% 2005-5-3
1382 The Proper Key 61% 2005-5-3
1383 Labyrinth图论->树的最长路 83% 2005-5-3
1384 Piggy-Bank 66% 2005-5-5
1385 Lifting the Stone 75% 2005-5-3
1386 Play on Words 73% 2005-5-3
1387 The Constraint Densest Submatrix 76% 2005-4-19
1388 Hinge Node Problem 31% 2005-4-17
1389 Area of Simple Polygons 83% 2004-12-10
1390 Blocks 70% 2005-3-10
1391 Erdos Numbers n/a 83% 2005-4-28
1392 Ouroboros Snake 73% 2005-4-24
1393 Fold-up Patterns 50% 2004-12-10
1394 Railroad图论->Dijkstra 78% 2005-4-27
1395 Cog-Wheels数学->解正系数的线性方程组 89% 2005-4-29
1396 Simple Arithmetics 54% 2005-4-28
1397 The Bulk 33% 2005-3-31
1398 Complete the sequence! 55% 2005-4-17
1399 Direct Visibility 60% 2005-4-26
1400 Complicated Expressions 69% 2005-5-4
1401 Factorial 46% 2005-5-7
1402 The Game of Master-Mind 50% 2005-3-31
1403 Hotline 0% 2005-2-25
1404 I-Keyboard 56% 2005-4-27
1405 Heritage 74% 2005-5-7
1406 A Starship Hakodate-maru 49% 2005-5-6
1407 e-market 72% 2005-4-18
1408 Fishnet几何 30% 2005-3-31
1409 77377 69% 2005-5-4
1410 Intersection 82% 2005-5-3
1411 Calling Extraterrestrial Intelligence Again送分题 75% 2005-5-4
1412 Equals are Equals 73% 2004-12-10
1413 GIGA Universe Cup 59% 2004-12-10
1414 Life Line 26% 2004-12-16
1415 Map of Ninja House 78% 2004-12-10
1416 Shredding Company 40% 2005-5-4
1417 True Liars 75% 2004-12-10
1418 Viva Confetti 69% 2004-12-10
1419 Graph Coloring 58% 2005-4-13
1420 Spreadsheet 50% 2005-4-8
1421 Peter‘s Calculator 50% 2005-5-6
1422 Air Raid 50% 2005-4-17
1423 Big Number 76% 2005-5-7
1424 Diamonds 56% 2005-2-17
1425 Enigmatic Travel 50% 2005-4-27
1426 Find The Multiple 48% 2005-5-2
1427 Get Them All 20% 2005-1-4
1428 Hermes‘ Colony 60% 2004-12-10
1429 Alice and Bobn/a 86% 2005-3-29
1430 Binary Stirling Numbers日期处理 69% 2005-5-7
1431 Calendar of Maya模拟 45% 2005-3-22
1432 Decoding Morse SequencesDP 71% 2005-5-4
1433 Exchanges 59% 2005-3-17
1434 Fill the Cisterns!计算几何->离散化/ 73% 2005-5-1
1435 Gates 44% 2005-4-27
1436 Horizontally Visible Segments 73% 2005-4-29
1437 Chat Rooms 83% 2005-4-30
1438 One-way Traffic 55% 2005-4-21
1439 Rhombs 67% 2005-5-3
1440 Varacious Steve 50% 2005-4-15
1441 Table 71% 2005-4-19
1442 Black Box 69% 2005-4-21
1443 DEL command 60% 2005-4-11
1444 Parallelepiped walk 40% 2005-5-2
1445 Random number数据结构->碓 85% 2005-3-31
1446 Moscow Time 74% 2005-5-2
1447 Ambiguous Dates日期处理 80% 2005-4-16
1448 Cube 50% 2005-5-4
1449 Enigma 0% 2005-3-31
1450 Gridland图论(本来TSP问题是NP难的，但这个图比较特殊，由现成的构造方法) 26% 2005-5-7
1451 T9 58% 2005-5-3
1452 Signal Box 0% 2004-12-10
1453 Delta Encoding and Decoding 77% 2005-4-2
1454 Factorial Frequencies 60% 2005-5-1
1455 Crazy tea party 35% 2005-5-6
1456 Supermarket 73% 2005-5-5
1457 Lord of the Ring 83% 2005-3-29
1458 Common Subsequence DP->LCS 67% 2005-5-5
1459 Power Network图论->最大流 62% 2005-5-7
1460 Firefighters 73% 2005-4-3
1461 Binary Polynomials 85% 2005-4-3
1462 Random Walk模拟+解线性方程组 71% 2005-5-5
1463 Strategic game贪心 74% 2005-5-5
1464 Company 86% 2005-4-27
1465 Multiple 82% 2005-5-4
1466 Girls and Boys图论->n/a 85% 2005-4-30
1467 Symbolic Derivation 67% 2005-5-6
1468 Rectangles 64% 2005-5-4
1469 COURSES贪心 74% 2005-5-6
1470 Closest Common Ancestors 76% 2005-5-1
1471 Triangles 55% 2005-5-1
1472 Instant Complexity 58% 2005-4-27
1473 There‘s Treasure Everywhere! 51% 2005-5-7
1474 Video Surveillance 36% 2005-4-27
1475 Pushing BoxesDP 57% 2005-3-31
1476 Always On the Run搜索->BFS 66% 2005-4-16
1477 Box of Bricks n/a 56% 2005-5-2
1478 Island of Logic 29% 2005-4-27
1479 MBone 33% 2005-2-26
1480 Optimal Programs搜索->BFS 79% 2005-4-16
1481 The Die Is Cast送分题 37% 2005-3-31
1482 It‘s not a Bug, It‘s a Feature!搜索->BFS 45% 2005-4-6
1483 Going in Circles on Alpha Centauri模拟 0% 2005-3-31
1484 Blowing Fuses送分题 48% 2005-4-27
1485 Fast FoodDP(似乎就是ioi2000的postoffice) 72% 2005-4-21
1486 Sorting Slides图论->拓扑排序 27% 2005-2-26
1487 Single-Player Games 67% 2005-3-31
1488 TEX Quotes 51% 2005-5-6
1489 Egyptian Multiplication 50% 2005-4-27
1490 Cabinets 57% 2005-4-27
1491 Pi 42% 2005-5-7
1492 Up and Down Sequences 27% 2005-5-6
1493 Machined Surfaces n/a 36% 2005-5-5
1494 Sunrise 30% 2005-4-14
1495 LED Test 39% 2005-4-29
1496 Word Index 36% 2005-5-6
1497 Molecules 0% 2005-4-14
1498 Matching Meetings 71% 2005-4-29
1499 Supercomputer Selection, The Sequel 43% 2005-4-26
1500 Polygonal Puzzle 86% 2005-4-26
1501 Word-Search Wonder 55% 2005-5-1
1502 MPI Maelstrom 42% 2005-4-9
1503 Integer Inquiry 67% 2005-5-7
1504 Adding Reversed Numbers 55% 2005-5-6
1505 Copying Books DP+二分查找 88% 2005-5-1
1506 Substitution Cipher 94% 2005-2-27
1507 Commedia dell‘ arte 79% 2005-4-16
1508 Skyscraper Floors 90% 2005-2-27
1509 Glass Beads n/a 59% 2005-5-1
1510 Hares and Foxes数论 85% 2005-4-13
1511 Invitation Cards 75% 2005-5-5
1512 Keeps Going and Going and ...模拟 50% 2005-2-27
1513 Scheduling Lectures DP 64% 2005-4-22
1514 Metal Cutting几何 37% 2005-4-1
1515 Street Directions图论->把一个无向连通图改造成为有向强连通图 62% 2005-4-1
1516 Parallel Deadlock 67% 2005-5-7
1517 u Calculate e送分题 35% 2005-5-6
1518 Problem Bee几何 40% 2005-5-6
1519 Digital Roots送分题(位数可能很大) 73% 2005-5-7
1520 Scramble Sort排序 50% 2005-4-20
1521 Entropy 47% 2005-5-6
1522 N-Credible Mazes 42% 2005-5-3
1523 SPF 61% 2005-4-27
1524 Cowculations 28% 2005-4-29
1525 Hi-Q 20% 2005-3-31
1526 Call Forwarding 19% 2005-4-28
1527 Making the Grade 14% 2005-4-25
1528 Perfection 49% 2005-5-7
1529 Shipping Routes 79% 2005-3-31
1530 Slurpys 43% 2005-5-7
1531 Trooper of Bam 100% 2004-12-10
1532 Mixed Numbers 93% 2004-12-10
1533 Mystery 91% 2005-5-2
1534 Terrorist Attack 79% 2004-12-10
1535 Forgetful 84% 2005-5-2
1536 Trains 97% 2004-12-10
1537 Identifying Legal Pascal Real Constants 75% 2005-5-6
1538 Extrapolation Using a Difference Table 55% 2005-5-6
1539 Evaluating Simple C Expressions 53% 2005-5-4
1540 The Finite State Text-Processing 50% 2005-2-27
1541 Dart-a-Mania 64% 2005-4-18
1542 DNA Translation 74% 2005-4-26
1543 Perfect Cubes 51% 2005-5-7
1544 A Puzzling Problem 70% 2005-3-5
1545 Galactic Import 33% 2005-5-6
1546 Basically Speaking 48% 2005-5-6
1547 Clay Bully送分题 49% 2005-5-4
1548 Robots 60% 2005-5-1
1549 Bright Bracelet 81% 2005-5-1
1550 Treadmill 62% 2005-4-26
1551 Data Mining? 47% 2005-5-1
1552 Doubles 51% 2005-5-6
1553 Fax Regions 78% 2005-3-31
1554 Tournament Brackets 69% 2005-4-9
1555 Polynomial Showdown送分题(非常阴险) 65% 2005-5-5
1556 The Doors 57% 2005-4-27
1557 Mapmaker 19% 2005-4-28
1558 Board Silly 36% 2005-5-5
1559 Equation Elation 50% 2005-3-31
1560 18 Wheeler Caravans (aka Semigroups) 53% 2005-5-5
1561 Another Puzzling Problem 57% 2005-4-27
1562 Oil Deposits 31% 2005-5-6
1563 The Snail送分题 48% 2005-5-4
1564 Sum It Up 57% 2005-5-4
1565 Skew Binary 22% 2005-5-4
1566 Haiku Review 57% 2005-5-4
1567 WIMP 20% 2005-2-27
1568 Find the Winning Move 28% 2005-5-6
1569 Myacm Triangles 23% 2005-4-15
1570 Exchange Rates 48% 2005-5-5
1571 Loansome Car Buyer 55% 2005-4-9
1572 Automatic Editing 78% 2005-4-27
1573 Robot Motion 43% 2005-5-6
1574 The Triangle Game 22% 2005-5-7
1575 Easier Done Than Said? 52% 2005-4-30
1576 Colorville 69% 2005-1-18
1577 Falling Leaves 50% 2005-3-19
1578 Instruens Fabulam 51% 2005-4-27
1579 Function Run Fun 42% 2005-5-4
1580 String Matching 63% 2005-5-7
1581 A Contesting Decision 34% 2005-5-3
1582 Which Way Do I Go? 89% 2005-3-31
1583 Choose Your Words Carefully 78% 2005-5-1
1584 A Round Peg in a Ground Hole 77% 2005-3-31
1585 Helping Florida 73% 2005-5-1
1586 Three Sides Make a Triangle 91% 2005-5-5
1587 High and Dry 88% 2005-3-31
1588 Reverse Roman Notation 72% 2005-3-31
1589 Unix ls 64% 2005-5-2
1590 Palindromes 65% 2005-5-7
1591 M*A*S*H 53% 2005-4-26
1592 Postscript 77% 2005-4-24
1593 Radar Scopes 67% 2005-4-19
1594 Message Routing 50% 2005-2-27
1595 Prime Cuts 56% 2005-5-7
1596 Gears on a Board 62% 2005-4-26
1597 Uniform Generator 63% 2005-5-1
1598 Excuses, Excuses! 60% 2005-4-20
1599 Station Balance 52% 2005-3-31
1600 Centipede Collisions 84% 2005-4-25
1601 Pizza Anyone?搜索 71% 2005-5-5
1602 Zip 85% 2005-4-21
1603 Risk 50% 2005-5-7
1604 Just the Facts送分题 64% 2005-5-2
1605 Horse Shoe Scoring几何 86% 2005-4-1
1606 Jugs数论/搜索 26% 2005-4-29
1607 Deck 61% 2005-5-2
1608 Banal Tickets 99% 2005-5-7
1609 Tiling Up Blocks 67% 2005-5-4
1610 Quad Trees 48% 2005-3-15
1611 The Suspects 68% 2005-5-1
1612 The Geodetic Set Problem 71% 2005-1-22
1613 Cave Raider 71% 2005-1-4
1614 Space AI Bombs 69% 2004-12-10
1615 Merging Sequences Problem 94% 2005-4-18
1616 Harmonic Periods 52% 2005-5-3
1617 Crypto Columns 48% 2005-5-7
1618 Decorations 66% 2005-5-7
1619 EKG Sequence 66% 2005-5-7
1620 Phone Home 64% 2005-5-7
1621 Polly Nomials 50% 2005-1-26
1622 Pushing Boxes 44% 2004-12-10
1623 Squadtrees 65% 2005-5-7
1624 This Takes the Cake 52% 2005-5-7
1625 Censored! 82% 2005-4-2
1626 Chapayev 87% 2005-4-22
1627 Experiment "X": Explosions Expected 89% 2005-5-7
1629 Fillword 44% 2005-5-6
1630 Max Separation 73% 2004-12-10
1631 Bridging signalsDP+二分查找 74% 2005-4-21
1632 Vase collection图论->最大完全图 66% 2005-3-26
1633 GladiatorsDP 46% 2005-5-1
1634 Who‘s the boss?排序 78% 2005-5-2
1635 Subway tree systems图论->不同表示法的二叉树判同 64% 2005-4-10
1636 Prison rearrangement 50% 2005-1-13
1637 Sightseeing tour图论->欧拉回路 67% 2005-4-29
1638 A number game博弈论 69% 2005-4-1
1639 Picnic Planning图论-> 87% 2005-4-22
1640 Poly-polygonal Numbers 72% 2005-4-21
1641 Rational Approximation数论 36% 2005-4-22
1642 Stacking Cubes 61% 2005-4-29
1643 Checker‘s Check 69% 2005-1-16
1644 To Bet or Not To Bet 66% 2005-4-21
1645 BSP Trees 54% 2005-4-21
1646 Double Trouble高精度 64% 2005-4-21
1647 One-move checkmate 82% 2005-5-7
1648 Countryside Highway 86% 2005-5-6
1649 Market Place 73% 2005-4-23
1650 Integer Approximation 80% 2005-5-7
1651 Multiplication Puzzle 73% 2005-5-7
1652 Holey Cloth 70% 2005-5-3
1653 Compacting Stickers 57% 2005-4-21
1654 Area几何 88% 2005-5-7
1655 Balancing Act 75% 2005-5-7
1656 Counting Black 39% 2005-5-6
1657 Distance on Chessboard送分题 70% 2005-5-7
1658 Eva‘s Problem送分题 49% 2005-5-7
1659 Frogs‘ Neighborhood 70% 2005-4-30
1660 Princess FroG构造 89% 2005-5-7
1661 Help JimmyDP 82% 2005-5-6
1662 CoIns 84% 2005-4-29
1663 Number Steps送分题 37% 2005-5-7
1664 放苹果 组合数学->递推 39% 2005-5-7
1665 Biker‘s Trip Odometer 43% 2005-5-7
1666 Candy Sharing Game 43% 2005-5-7
1667 Peg Game 78% 2005-4-1
1668 Taxation With Representation Overdone 69% 2005-4-1
1669 It‘s Logical 68% 2005-4-16
1670 Obstructed Rook Circuits 83% 2004-12-10
1671 Rhyme Schemes 53% 2005-5-5
1672 Fully Diversified Sequences of Sets 55% 2005-4-1
1673 EXOCENTER OF A TRIANGLE 57% 2005-4-1
1674 Sorting by Swapping n/a 64% 2005-5-6
1675 Happy Birthday! 74% 2005-3-20
1676 What time is it? 57% 2005-3-9
1677 Girls‘ Day送分题 83% 2005-5-5
1678 I Love this Game! 72% 2005-5-5
1679 The Unique MST n/a 82% 2005-5-5
1680 Fork() Makes Trouble 20% 2004-12-14
1681 Painter‘s Problem 50% 2005-4-27
1682 Clans on the Three Gorges 71% 2004-12-10
1683 Puzzlestan 72% 2005-4-30
1684 Dynamic Declaration Language (DDL) 77% 2005-4-16
1685 Color Tunnels 62% 2005-4-29
1686 Lazy Math Instructor 69% 2005-4-30
1687 Buggy Sat 66% 2005-4-20
1688 Dolphin Pool计算几何 78% 2005-4-30
1689 3002 Rubbery 49% 2005-2-3
1690 (Your)((Term)((Project)))送分题 69% 2005-5-4
1691 Painting A Board搜索/DP 39% 2005-4-9
1692 Crossed Matchings DP 53% 2005-5-5
1693 Counting Rectangles几何 54% 2005-4-29
1694 An Old Stone Game博弈论? 54% 2005-4-30
1695 Magazine Delivery图论-> 59% 2005-4-30
1696 Space Ant 19% 2005-1-4
1697 The Erythea Campaign 57% 2005-4-30
1698 Alice‘s Chance 69% 2005-5-7
1699 Best Sequence 75% 2005-5-7
1700 Crossing River 77% 2005-5-7
1701 Dissatisfying Lift 85% 2005-5-7
1702 Eva‘s Balance 58% 2005-5-6
1703 Find them, Catch them 88% 2005-5-6
1704 Georgia and Bob 77% 2005-5-1
1705 Generational Replacement 84% 2005-4-30
1706 References 91% 2005-2-15
1707 Sum of powers 73% 2005-5-7
1708 Game 85% 2005-5-7
1709 Crossword 88% 2005-4-30
1710 Magic of David Copperfield 68% 2005-4-30
1711 Puncher 74% 2005-4-25
1712 Flying Stars DP 70% 2005-4-30
1713 Divide et unita搜索 81% 2004-12-10
1714 The Cave搜索/DP 78% 2005-1-20
1715 Hexadecimal Numbers n/a 80% 2005-4-29
1716 Integer Intervals 56% 2005-5-5
1717 Dominoes DP 55% 2005-3-21
1718 River Crossing DP 53% 2005-4-15
1719 Shooting Contest贪心 64% 2005-5-7
1720 SQUARES 65% 2005-3-17
1721 CARDS 61% 2005-4-24
1722 SUBTRACT 60% 2005-3-25
1723 SOLDIERS 60% 2005-3-27
1724 ROADS 70% 2005-4-28
1725 BALL 29% 2005-5-4
1726 Tango Tango Insurrection 81% 2004-12-10
1727 Advanced Causal Measurements (ACM) 74% 2004-12-10
1728 A flea on a chessboard 76% 2005-5-7
1729 Jack and Jill图论-> 67% 2005-3-17
1730 Perfect Pth Powers数论 87% 2005-5-7
1731 Orders 44% 2005-5-7
1732 Phone numbers DP 87% 2005-5-2
1733 Parity game 76% 2005-5-7
1734 Sightseeing trip图论->Euler回路 61% 2005-4-25
1735 A Game on the Chessboard 33% 2005-5-4
1736 Block Town 67% 2005-5-4
1737 Connected Graph 68% 2005-4-25
1738 An old Stone Game博弈论? 98% 2005-5-1
1739 Tony‘s Tour 97% 2004-12-17
1740 A New Stone Game 56% 2005-4-30
1741 Tree博弈论? 94% 2005-5-2
1742 Coins 93% 2005-5-5
1743 Musical Theme 91% 2005-5-2
1744 Elevator Stopping Plan 88% 2005-4-30
1745 DivisibilityDP 73% 2005-5-5
1746 Loan 80% 2005-4-1
1747 Expression 40% 2005-4-1
1748 Computer Dialogue 56% 2005-3-11
1749 Lock Manager 53% 2005-4-1
1750 Dictionary 64% 2005-4-29
1751 Highways图论-> 85% 2005-4-10
1752 Advertisement贪心/图论->差分约束系统 50% 2005-4-21
1753 Flip Game搜索->BFS 63% 2005-5-4
1754 Buffer Manager 76% 2005-5-4
1755 Triathlon计算几何? 91% 2005-3-28
1756 Domino Puzzle 58% 2005-5-2
1757 Binary Search 73% 2005-4-1
1758 Frontier 61% 2005-4-21
1759 Garland 53% 2005-5-7
1760 Disk Tree 79% 2005-5-7
1761 Easy Task 74% 2005-5-3
1762 Bundling 20% 2005-3-16
1763 Shortcut 65% 2005-5-6
1764 Dice Contest 99% 2005-3-16
1765 November Rain 98% 2005-4-22
1766 Football 27% 2005-3-13
1767 Which is Next 73% 2005-3-12
1768 Hang or not to hang 70% 2005-3-14
1769 Minimizing maximizer 80% 2005-5-3
1770 Special Experiment树形DP 81% 2005-3-24
1771 Elevator Stopping Plan DP 73% 2005-4-27
1772 New Go Game构造? 91% 2005-3-10
1773 Outernet模拟 62% 2005-4-16
1774 Fold Paper Strips几何 72% 2005-3-10
1775 Sum of Factorials送分题 79% 2005-5-6
1776 Task Sequences DP 78% 2005-4-6
1777 Vivian‘s Problem数论 74% 2005-3-24
1778 All Discs Considered 89% 2005-2-18
1779 Boolean Logic 57% 2005-4-25
1780 Code 78% 2005-2-18
1781 In Danger 58% 2005-5-6
1782 Run Length Encoding 84% 2005-5-4
1783 Fractran 64% 2005-2-19
1784 Huffman‘s Greed 51% 2005-5-1
1785 Binary Search Heap Construction 91% 2005-4-30
1786 Bridge Hands 60% 2005-4-23
1787 Charlie‘s Change 87% 2005-4-23
1788 Building a New Depot 62% 2005-4-26
1789 Truck History 66% 2005-5-1
1790 Base Numbers 70% 2005-4-1
1791 Paper Cutting 36% 2005-4-23
1792 Hexagonal Routes 71% 2005-4-23
1793 Storehouse 74% 2005-4-23
1794 Castle Walls 83% 2005-5-1
1795 DNA Laboratory 90% 2005-5-4
1796 Extra Terrestrial PISA Test 49% 2005-5-2
1797 Heavy Transportation 80% 2005-5-6
1798 Dory‘s Phonebook 76% 2005-5-3
1799 Yeehaa! 49% 2005-5-7
1800 Magic Trick 89% 2005-5-5
1801 Formula Racing 82% 2005-5-4
1802 Ancient Plates 80% 2005-5-6
1803 Box Art 93% 2004-12-10
1804 Brainman 45% 2005-5-4
1805 Friends 82% 2005-5-5
1806 Manhattan 2025 34% 2005-5-4
1807 Mayan Dates 50% 2005-5-6
1808 Quadratic Residues 83% 2005-5-5
1809 Regetni 74% 2005-5-4
1810 Covering 92% 2005-4-12
1811 Prime Test 96% 2005-4-30
1812 Zuma Game 80% 2004-12-10
1813 Overlapped Shapes 78% 2004-12-10
1814 Polynomial 97% 2005-2-2
1815 Friendship 92% 2004-12-10
1816 Wild Words 89% 2005-3-13
1817 Traffic Jam 39% 2005-4-9
1818 ATP 85% 2005-4-21
1819 Disks 82% 2005-4-22
1820 Expression 100% 2005-1-29
1821 Fence 91% 2005-4-6
1822 Fence2 69% 2005-4-29
1823 Hotel 87% 2005-4-27
1824 TwoFour 72% 2005-1-18
1825 Young 57% 2005-4-21
1826 The Best Farm 82% 2005-4-6
1827 A Bunch Of Monsters 74% 2005-4-21
1828 Monkeys‘ Priden/a 66% 2005-5-7
1829 火力防御网 68% 2005-2-28
1830 开关问题 77% 2005-4-17
1831 不定方程组 69% 2005-4-9
1832 连环锁 76% 2005-4-17
1833 排列 66% 2005-5-4
1834 线段处理 88% 2004-12-10
1835 宇航员 71% 2005-4-30
1836 Alignment 88% 2005-5-2
1837 Balance 51% 2004-12-13
1838 Banana 74% 2004-12-14
1839 Cattle 89% 2005-2-12
1840 Eqs 81% 2005-4-4
1841 Meadow 78% 2005-4-30
1842 Parking 40% 2005-2-12
1843 Shire 94% 2004-12-13
1844 Sum 45% 2005-5-6
1845 Sumdiv 91% 2005-4-17
1846 System 78% 2005-4-13
1847 Tram 61% 2005-4-21
1848 Tree 87% 2005-5-5
1849 Two 43% 2005-4-10
1850 Code 65% 2005-5-2
1851 Map 56% 2005-4-22
1852 Ants 50% 2005-4-23
1853 Cat 53% 2004-12-10
1854 Evil Straw Warts Live 84% 2005-4-12
1855 Mint 63% 2005-5-7
1856 Sea Battle 81% 2005-4-26
1857 To Europe! To Europe! 70% 2005-5-7
1858 Interesting Maze Game 70% 2005-4-27
1859 The Perfect Symmetry 71% 2005-5-4
1860 Currency Exchange 74% 2005-4-29
1861 Network 68% 2005-5-7
1862 Stripies 54% 2005-5-7
1863 Subnumber 87% 2005-4-1
1864 Funny Card Game 100% 2005-1-29
1865 Practice 26% 2005-4-15
1866 Help! 41% 2005-5-4
1867 Treequivalence 37% 2005-4-13
1868 Antiarithmetic? 56% 2005-5-1
1869 Test 56% 2005-4-1
1870 Bee Breeding送分题 64% 2005-5-4
1871 Bullet Hole几何 83% 2005-5-4
1872 A Dicey Problem BFS 83% 2005-5-4
1873 The Fortified Forest几何+回溯 81% 2005-5-6
1874 Trade on Verweggistan DP 83% 2005-5-6
1875 Robot几何 78% 2005-4-8
1876 The Letter Carrier‘s Rounds模拟 95% 2005-5-3
1877 Flooded!数据结构->堆 69% 2005-5-5
1878 Jill‘s Bike 81% 2005-5-6
1879 Tempus et mobilius Time and motion模拟+组合数学->Polya定理 52% 2005-5-5
1880 Variable Radix Huffman Encoding 81% 2005-2-18
1881 Sail Race 43% 2005-2-18
1882 Stamps搜索+DP 81% 2005-5-5
1883 Theseus and the Minotaur模拟 74% 2005-3-19
1884 Train Time 95% 2005-3-15
1885 Uncompress 78% 2005-5-5
1886 Borrowers 82% 2005-2-18
1887 Testing the CATCHER DP 67% 2005-4-20
1888 Crossword Answers 62% 2005-4-18
1889 Package Pricing DP 96% 2005-2-18
1890 Switching Channels 40% 2005-2-18
1891 Typesetting 99% 2005-2-18
1892 VTAS - Vessel Traffic Advisory Service 100% 2004-12-10
1893 Monitoring Wheelchair Patients模拟+几何 84% 2005-2-18
1894 Alternative Scale of Notation 76% 2005-4-11
1895 Bring Them There 88% 2005-4-14
1896 Code Formatting 74% 2005-4-11
1897 Data Mining 85% 2005-4-27
1898 Entropy 87% 2005-4-13
1899 Farmer Bill‘s Problem 85% 2005-5-4
1900 Game 76% 2005-5-1
1901 Hypertransmission 88% 2005-5-5
1902 Illumination 95% 2005-4-21
1903 Jurassic Remains 76% 2005-4-28
1904 King‘s Quest 93% 2005-4-21
1905 Expanding Rods 88% 2005-5-7
1906 Three powers 70% 2005-5-7
1907 Work Reduction 80% 2005-5-5
1908 Grid Speed 91% 2005-5-5
1909 Marbles on a tree 61% 2005-5-5
1910 Adam‘s Genes 40% 2005-4-1
1911 A Well-Formed Problem 33% 2005-4-1
1912 A highway and the seven dwarfs 97% 2005-5-7
1913 Cocktails 92% 2004-12-10
1914 Cramer‘s Rule 87% 2005-4-27
1915 Knight Moves搜索->BFS 72% 2005-5-3
1916 Rat Attack数据结构->? 77% 2005-5-4
1917 Automatic Poetry 49% 2005-5-6
1918 Ranking List 79% 2005-4-20
1919 Ship Journey 93% 2005-5-5
1920 Towers of Hanoi 85% 2005-5-4
1921 Paper Cut 71% 2005-4-16
1922 Ride to School 70% 2005-5-6
1923 Fourier‘s Lines 81% 2005-5-6
1924 The Treasure 89% 2005-5-4
1925 Spiderman 95% 2005-5-6
1926 Pollution 80% 2005-5-5
1927 Area in Triangle 59% 2005-3-23
1928 The Peanuts 61% 2005-5-6
1929 Calories from Fat 49% 2005-5-7
1930 Dead Fraction 82% 2005-5-4
1931 Biometrics 63% 2005-5-4
1932 XYZZY 76% 2005-5-7
1933 A Brief Gerrymander 84% 2005-5-4
1934 Trip 86% 2005-5-5
1935 Journey 82% 2005-5-3
1936 All in All DP? 76% 2005-5-6
1937 Balanced Food 84% 2005-3-31
1938 California Jones and the Gate to Freedom 63% 2005-3-31
1939 Diplomatic License 51% 2005-5-3
1940 Polygon Programming with Ease 39% 2005-5-3
1941 The Sierpinski Fractal 52% 2005-5-3
1942 Paths on a Grid 79% 2005-5-3
1943 Hall of Fountains 55% 2005-3-31
1944 Fiber Communications 81% 2005-5-6
1945 Power Hungry Cows 92% 2005-5-1
1946 Cow Cycling DP 62% 2005-4-29
1947 Rebuilding Roads二分 69% 2005-4-30
1948 Triangular Pastures 78% 2005-4-30
1949 Chores 68% 2005-5-3
1950 Dessert 66% 2005-5-3
1951 Extra Krunch 81% 2005-5-6
1952 BUY LOW, BUY LOWER 80% 2005-4-30
1953 World Cup Noise 55% 2005-5-5
1954 Warez Test 98% 2004-12-10
1955 Rubik‘s Cube 54% 2005-3-18
1956 Pumps and Pipes 76% 2004-12-10
1957 Beehives 80% 2005-4-30
1958 Strange Towers of Hanoi 40% 2005-5-7
1959 Darts 53% 2005-4-30
1960 Time Planner 79% 2004-12-10
1961 Period 89% 2005-5-7
1962 Corporative Network 76% 2005-5-1
1963 Cave Exploration 60% 2005-4-1
1964 City Game 75% 2005-5-2
1965 Cube Root 77% 2005-4-21
1966 Cable TV Network 69% 2005-5-2
1967 Alibaba 78% 2005-3-24
1968 Booklets 67% 2005-4-17
1969 Count on Canton 57% 2005-5-7
1970 The Game 76% 2005-4-27
1971 Parallelogram Counting 83% 2005-5-2
1972 Dice Stacking 36% 2005-4-27
1973 Software Company 79% 2005-4-27
1974 The Happy Worm 86% 2005-4-27
1975 Median Weight Bead 63% 2005-4-27
1976 A Mini Locomotive 47% 2005-4-27
1977 Odd Loving Bakers 88% 2005-4-27
1978 Hanafuda Shuffle 26% 2005-4-28
1979 Red and Black 23% 2005-5-7
1980 Unit Fraction Partition 75% 2005-5-2
1981 Circle and Points 81% 2005-4-15
1982 Water Tank 50% 2005-4-1
1983 Name the Crossing 77% 2005-4-17
1984 Navigation Nightmare 84% 2005-5-5
1985 Cow Marathon图论->有向无环图的最长路 80% 2005-5-5
1986 Distance Queries 87% 2005-5-6
1987 Distance Statistics 88% 2005-5-7
1988 Cube Stacking 81% 2005-5-5
1989 The Cow Lineup 62% 2005-5-5
1990 MooFest 87% 2005-5-5
1991 Turning in Homework 63% 2005-5-6
1992 Jack 53% 2005-4-4
1993 Caleidoscope 36% 2005-3-31
1994 Logic 0% 2004-12-10
1995 Raising Modulo Numbers数论->大数的幂求余 58% 2005-5-6
1996 The Highest Profits 40% 2005-3-31
1997 Word Puzzle 79% 2004-12-10
1998 Lloyd Fifteen Puzzle 50% 2005-3-31
1999 Quorf 50% 2005-3-31
2000 Gold Coins 39% 2005-5-7
2001 Shortest Prefixes 65% 2005-5-4
2002 Squares 83% 2005-5-3
2003 Hire and Fire 66% 2005-5-4
2004 Mix and Build 80% 2005-5-4
2005 Blackjack 81% 2005-5-7
2006 Litmus Test 42% 2005-5-1
2007 Scrambled Polygon 59% 2005-5-4
2008 Moo University - Team Tryouts 83% 2005-5-5
2009 Moo University - Emergency Pizza Order 86% 2005-5-5
2010 Moo University - Financial Aid 84% 2005-5-5
2011 Primary X-Subfactor Series 72% 2005-4-23
2012 Triangle Cuts 85% 2005-3-5
2013 Symmetric Order 41% 2005-5-6
2014 Flow Layout 27% 2005-5-5
2015 Permutation Code 65% 2005-5-7
2016 Ink Blots 72% 2005-5-1
2017 Speed Limit 36% 2005-5-6
2018 Best Cow Fences 90% 2005-5-5
2019 Cornfields 65% 2005-5-5
2020 MisLED 84% 2005-5-4
2021 Relative Relatives 54% 2005-5-4
2022 Syntax Included 74% 2005-4-17
2023 Choose Your Own Adventure 65% 2005-5-6
2024 Know When to Hold ‘em 73% 2005-3-19
2025 Cubic Rube 81% 2005-3-19
2026 As the Crow Flies 43% 2005-3-19
2027 No Brainern/a 29% 2005-5-6
2028 When Can We Meet? 44% 2005-5-7
2029 Get Many Persimmon Trees 22% 2005-5-6
2030 The Secret Number 66% 2005-4-19
2031 Building a Space Station 24% 2005-4-17
2032 Square Carpets 75% 2005-5-6
2033 Alphacode 78% 2005-5-6
2034 Anti-prime Sequences 62% 2005-5-3
2035 Hit or Miss 64% 2005-4-28
2036 I Conduit! 86% 2005-5-4
2037 Roll Playing Games 79% 2005-5-5
2038 Team Rankings 46% 2005-4-28
2039 To and Fro 36% 2005-5-7
2040 Translations 60% 2005-3-19
2041 Unreliable Message 17% 2005-4-29
2042 Lagrange‘s Four-Square Theorem 41% 2005-4-27
2043 Area of Polygons 65% 2005-4-27
2044 Weather Forecast 73% 2005-4-28
2045 Molecular Formula 35% 2005-5-5
2046 Gap 82% 2005-5-7
2047 Concert Hall Scheduling 69% 2005-4-29
2048 Monster Trap 86% 2005-4-20
2049 Finding Nemo图论->最短路 86% 2005-5-6
2050 Searching the Web模拟(需要高效实现) 80% 2005-5-2
2051 Argus送分题(最好用堆，不用也可以过) 63% 2005-5-7
2052 Fun Game 83% 2005-4-27
2053 Square 81% 2005-5-6
2054 Color a Tree贪心 79% 2005-5-6
2055 Kid‘s Problem 89% 2005-4-5
2056 The Separator in Grid 75% 2005-5-7
2057 The Lost House 66% 2005-4-28
2058 Word Encoding 63% 2005-5-2
2059 Watchdog 31% 2005-5-3
2060 Taxi Cab Scheme 73% 2005-5-2
2061 Pseudo-random Numbers数论 85% 2005-5-4
2062 Card Game Cheater 46% 2005-5-3
2063 Investment 66% 2005-5-2
2064 Pipes 79% 2005-3-20
2065 SETI 39% 2005-4-20
2066 Minimax Triangulation 69% 2005-5-2
2067 Young, Poor and Busy 0% 2005-2-3
2068 Nim 29% 2005-3-26
2069 Super Star 94% 2005-2-3
2070 Filling Out the Team 49% 2005-5-6
2071 Auctions R Us 73% 2005-4-1
2072 GHOST 89% 2005-1-17
2073 Doggone Moles 76% 2005-3-17
2074 Line of Sight 82% 2005-4-9
2075 Tangled in Cables 54% 2005-5-6
2076 All Roads Lead to Albuquerque, er, Rome 89% 2005-3-19
2077 Balanced Budget Initiative 89% 2005-4-9
2078 Matrix 53% 2005-5-6
2079 Triangle 86% 2005-5-7
2080 Calendar日期处理 60% 2005-5-6
2081 Recaman‘s Sequence 79% 2005-5-7
2082 Terrible Sets分治/ 56% 2005-4-29
2083 Fractal递归 37% 2005-5-1
2084 Game of Connections递推(不必高精度) 61% 2005-5-7
2085 Inversion 72% 2005-5-4
2086 Land Division Tax 69% 2005-4-6
2087 Petanque 73% 2005-5-5
2088 Long Night of Museums 82% 2005-4-23
2089 Magic Trick 38% 2005-4-26
2090 Two-Stacks Solitaire 90% 2005-4-3
2091 Zing Zhu‘s Oyster Farm 65% 2005-4-12
2092 Grandpa is Famous 53% 2005-5-7
2093 Cutting Edge 87% 2005-4-11
2094 Angry Teacher 95% 2005-3-21
2095 Beth Tableaux 67% 2005-2-24
2096 Collecting Bugs 83% 2005-3-13
2097 Drawing Windows 0% 2004-12-10
2098 Ellipse 66% 2005-3-27
2099 Fool‘s Day 98% 2005-4-12
2100 Graveyard Design 90% 2005-5-4
2101 Honey and Milk Land 41% 2005-5-7
2102 Incredible! Impossible! 91% 2005-4-23
2103 Jackpot 93% 2005-2-21
2104 K-th Number 90% 2005-5-7
2105 IP Address送分题 47% 2005-5-7
2106 Boolean Expressions 73% 2005-5-7
2107 Gear Profiles 73% 2005-4-18
2108 Lazy Pianist 83% 2005-4-20
2109 Power of Cryptography 61% 2005-5-6
2110 Mountain Walking 74% 2005-5-5
2111 Millenium Leapcow 66% 2005-5-4
2112 Optimal Milking 62% 2005-5-4
2113 Agents 83% 2005-4-2
2114 Boatherds 64% 2005-5-3
2115 C Looooops数论->解模线性方程 90% 2005-5-7
2116 Death to Binary? 71% 2005-4-30
2117 Electricity 74% 2005-2-22
2118 Firepersons 71% 2005-4-15
2119 God of the Vile Baskers 88% 2005-3-4
2120 Herbalists 33% 2005-4-13
2121 Inglish-Number Translator 67% 2005-5-5
2122 Japan Plotter Driver 59% 2005-4-13
2123 Artinals 67% 2005-4-2
2124 Crankshaft 79% 2005-5-7
2125 Destroying The Graph 84% 2005-5-6
2126 Factoring a Polynomial 59% 2005-5-7
2127 Greatest Common Increasing Subsequence 87% 2005-5-7
2128 Highways 69% 2005-5-7
2129 Invariant Polynomials 65% 2005-5-7
2130 Jogging 100% 2005-1-29
2131 Key Insertion 89% 2005-5-4
2132 Cow Math 81% 2005-5-6
2133 Cow Imposters 80% 2005-5-3
2134 Traffic Lights 81% 2005-5-6
2135 Farm Tour 88% 2005-5-7
2136 Vertical Histogram送分题 63% 2005-5-7
2137 Cowties 77% 2005-5-7
2138 Travel Games 77% 2005-5-7
2139 Six Degrees of Cowvin Bacon 62% 2005-5-2
2140 Herd Sumsn/a 46% 2005-5-7
2141 Message Decowding 45% 2005-5-4
2142 The Balance 72% 2005-5-5
2143 Make a Sequence 51% 2005-4-22
2144 Leaky Cryptography 18% 2005-4-30
2145 Pathological Paths 51% 2005-4-30
2146 Confusing Login Names 78% 2005-5-5
2147 Dice Puzzle 40% 2005-4-21
2148 Color the Map 69% 2005-3-31
2149 Inherit the Spheres 86% 2005-4-1
2150 Crossing Prisms 79% 2005-5-6
2151 Check the difficulty of problems 75% 2005-5-5
2152 Fire 91% 2005-3-17
2153 Rank List 80% 2005-5-5
2154 Color 80% 2005-5-7
2155 Matrix 93% 2005-5-7
2156 National Day Celebration 85% 2005-4-14
2157 Maze 66% 2005-5-6
2158 A Difficult Mathematics Problem 79% 2005-5-5
2159 Ancient Cipher 69% 2005-5-5
2160 Box 65% 2005-5-5
2161 Chandelier 73% 2005-5-5
2162 Document Indexing 86% 2005-4-26
2163 Easy Trading 52% 2005-5-5
2164 Find the Border 60% 2005-5-1
2165 Gunman计算几何 62% 2005-5-6
2166 Heapsort 48% 2005-5-6
2167 Irrelevant Elements 85% 2005-5-6
2168 Joke with Turtles 84% 2005-5-7
2169 Kingdom of Magic 69% 2005-5-6
2170 Lattice Animals 36% 2005-5-1
2171 Amusing Numbers 62% 2005-3-30
2172 Bricks 87% 2005-3-30
2173 Cricket Field 71% 2005-5-3
2174 Decoding Task 44% 2005-5-4
2175 Evacuation Plan 79% 2005-3-30
2176 Folding 66% 2005-4-28
2177 Ghost Busters 0% 2005-1-28
2178 Heroes Of Might And Magic 78% 2005-4-14
2179 Inlay Cutters枚举 65% 2005-4-22
2180 Bale Figures 79% 2005-5-5
2181 Jumping Cows递推 58% 2005-5-7
2182 Lost Cows->线段树/ 41% 2005-5-7
2183 Bovine Math Geniuses 51% 2005-5-7
2184 Cow Exhibition DP 82% 2005-5-7
2185 Milking Grid 58% 2005-4-30
2186 Popular Cows 87% 2005-5-7
2187 Beauty Contest 84% 2005-5-4
2188 Cow Laundry 48% 2005-5-6
2189 Romeo Meets Juliet 61% 2005-4-28
2190 ISBN送分题 72% 2005-5-7
2191 Mersenne Composite Numbers数论 62% 2005-5-7
2192 Zipper DP->LCS变形 76% 2005-5-7
2193 Lenny‘s Lucky Lotto ListsDP 71% 2005-5-3
2194 Stacking Cylinders几何 27% 2005-5-3
2195 Going Home图论->二分图的最大权匹配 82% 2005-5-4
2196 Specialized Four-Digit Numbers送分题 25% 2005-5-7
2197 Jill‘s Tour Paths图论-> 85% 2005-5-3
2198 Boundaries on 81% 2005-4-9
2199 Rate of Return高精度 64% 2005-5-5
2200 A Card Trick模拟 52% 2005-4-10
2201 Cartesian Tree 82% 2005-5-7
2202 Strange Graph 78% 2005-5-6
2203 Patience 10% 2005-3-25
2204 Commuter train 56% 2005-3-25
2205 Self-Replicating Numbers 83% 2005-3-9
2206 Magic Multiplying Machine 84% 2005-4-15
2207 Intuitionistic Logic 87% 2005-3-18
2208 Pyramids 83% 2005-5-5
2209 The King 44% 2005-5-7
2210 Metric Time日期处理 80% 2005-4-18
2211 Photograph 38% 2005-3-30
2212 Cavern 52% 2005-4-16
2213 Code 36% 2005-4-24
2214 Regions 37% 2005-4-29
2215 Parliament 4% 2005-5-1
2216 Roulette 89% 2005-3-30
2217 Secretary 42% 2005-3-30
2218 Does This Make Me Look Fat? 45% 2005-5-1
2219 Manifest Destiny 58% 2005-3-30
2220 Treasure Hunters 33% 2005-3-30
2221 Frogger‘s For Dinner 25% 2005-3-30
2222 Deeper Blue 30% 2005-5-4
2223 Get Out ‘Da Way! 75% 2005-4-28
2224 Missing Piece 2001 71% 2005-3-30
2225 Asteroids! 66% 2005-5-3
2226 Muddy Fields 85% 2005-5-3
2227 The Wedding Juicer 73% 2005-5-6
2228 Naptime 74% 2005-5-3
2229 Sumsets 83% 2005-5-6
2230 Watchcow 76% 2005-5-7
2231 Moo Volume 85% 2005-5-7
2232 New Stone-Forfex-Cloth Game 74% 2005-4-23
2233 GAME AGAIN! 94% 2005-3-15
2234 Matches Game 61% 2005-5-7
2235 Triangularize the Convex Hull 80% 2005-2-28
2236 Wireless Network 73% 2005-5-6
2237 Can 1 Marine win 2 Zerglings? 81% 2005-4-1
2238 Computer Basketball Game 76% 2005-3-28
2239 Selecting Courses图论->二分图的最大匹配 64% 2005-5-5
2240 Arbitrage 65% 2005-5-2
2241 The Tower of Babylon 16% 2005-5-5
2242 The Circumference of the Circle 31% 2005-5-7
2243 Knight Moves搜索->BFS 19% 2005-5-7
2244 Eeny Meeny Moo 34% 2005-5-5
2245 Lotto 24% 2005-5-6
2246 Matrix Chain Multiplication 44% 2005-5-6
2247 Humble Numbers递推(最优O(n)算法) 59% 2005-5-7
2248 Addition Chains 54% 2005-5-6
2249 Binomial Showdown 70% 2005-5-6
2250 Compromise 50% 2005-5-7
2251 Dungeon Master 54% 2005-5-5
2252 Equation Solver 10% 2005-5-7
2253 Frogger图论->Dijkstra变形(和1295是一样的) 45% 2005-5-4
2254 Globetrotter几何 56% 2005-5-7
2255 Tree Recovery 26% 2005-5-6
2256 Artificial Intelligence? 17% 2005-5-5
2257 Balancing Bank Accounts 25% 2005-5-5
2258 The Settlers of Catan 31% 2005-5-6
2259 Team Queue 70% 2005-5-5
2260 Error Correction 43% 2005-5-7
2261 France ‘98递推 53% 2005-5-5
2262 Goldbach‘s Conjecture 59% 2005-5-7
2263 Heavy Cargo 45% 2005-5-2
2264 Advanced Fruits 65% 2005-5-5
2265 Bee Maja 30% 2005-5-5
2266 Quadtree 78% 2005-5-5
2267 From Dusk till Dawn or: Vladimir the Vampire 80% 2005-5-6
2268 Euro Cup 2000 33% 2005-5-5
2269 Friends 52% 2005-5-5
2270 Quadtree II or: Florida Jones strikes back 33% 2005-5-5
2271 HTML 58% 2005-5-7
2272 Bullseye 60% 2005-5-7
2273 An Excel-lent Problem 31% 2005-5-4
2274 The Race 86% 2005-5-5
2275 Flipping Pancake构造 43% 2005-5-3
2276 Model Rocket Height 32% 2005-5-4
2277 Region Filling 94% 2005-3-14
2278 Histology Assistant 89% 2005-4-7
2279 Mr. Young‘s Picture Permutations 56% 2005-4-8
2280 Amphiphilic Carbon Molecules 52% 2005-4-25
2281 Link and Pop -- the Block Game 67% 2005-5-5
2282 The Counting Problem 59% 2005-5-7
2283 Different Digits 82% 2005-5-5
2284 That Nice Euler Circuit计算几何 71% 2005-4-29
2285 The Floor Bricks 60% 2005-5-6
2286 The Rotation Game 90% 2005-5-3
2287 Tian Ji -- The Horse Racing 86% 2005-5-7
2288 Islands and Bridges 88% 2005-4-27
2289 Jamie‘s Contact Groups图论->网络流? 76% 2005-5-2
2290 House Numbers 76% 2005-5-2
2291 Rotten Ropes送分题 39% 2005-5-7
2292 Optimal Keypad DP 51% 2005-4-23
2293 Hey, Pay Day! 68% 2005-4-19
2294 Unfoldung 100% 2005-4-16
2295 A DP Problem 76% 2005-5-3
2296 Map Labeler 89% 2005-3-31
2297 Balanced Chemical Equations 63% 2005-3-17
2298 Great Circle 87% 2005-5-4
2299 Ultra-QuickSort排序->归并排序 81% 2005-5-5
2300 Up the Ante 71% 2005-4-12
2301 Beat the Spread! 50% 2005-5-6
2302 Traditional BINGO 46% 2005-5-4
2303 Russian Dolls 80% 2005-5-4
2304 Combination Lock送分题 31% 2005-5-7
2305 Basic remains 62% 2005-5-4
2306 Genealogical Research 56% 2005-5-4
2307 Treasure Map 27% 2005-5-7
2308 Dearboy‘s Puzzle 94% 2005-4-15
2309 BST送分题 43% 2005-5-7
2310 Cubic Tick-Tack-Toe 95% 2005-3-25
2311 Cutting Game博弈论 94% 2005-5-5
2312 Battle City搜索->BFS 77% 2005-5-3
2313 Sequence 71% 2005-5-6
2314 POJ language模拟 75% 2005-4-2
2315 Football Game几何 85% 2005-4-18
2316 SPIN 59% 2005-5-7
2317 SHAKE 56% 2005-5-3
2318 TOYS 49% 2005-5-2
2319 COMPRESS 81% 2005-4-10
2320 SHEET 47% 2005-4-18
2321 GYM 35% 2005-5-3
2322 PLANKS 59% 2005-3-30
2323 PERMS 41% 2005-5-1
2324 Intellectual Property 71% 2005-3-30
2325 Persistent Numbers 42% 2005-5-7
2326 Major Scales 46% 2005-5-1
2327 Dumb Bones 49% 2005-4-29
2328 Guessing Game 70% 2005-5-7
2329 Nearest number - 2 76% 2005-5-5
2330 Advanced ASCII Cubes 32% 2005-5-5
2331 Water pipe 90% 2005-4-30
2332 One is good, but two is better 69% 2005-5-6
2333 Beach cut 80% 2005-5-4
2334 Simple prefix compression 60% 2005-5-5
2335 Temple of Dune 55% 2005-4-7
2336 Ferry Loading II 51% 2005-5-6
2337 Catenyms 84% 2005-5-6
2338 Basic 70% 2005-5-3
2339 Rock, Scissors, Paper 35% 2005-5-6
2340 Memory management 81% 2005-5-2
2341 Spell checker 68% 2005-5-3
2342 Anniversary party 35% 2005-5-5
2343 Airline company 38% 2005-5-7
2344 Nikifor 53% 2005-5-4
2345 Central heating 46% 2005-5-6
2346 Lucky tickets组合数学 43% 2005-5-4
2347 Equations 82% 2005-5-7
2348 Euclid‘s Game 66% 2005-5-7
2349 Arctic Network 48% 2005-5-4
2350 Above Average 40% 2005-5-7
2351 Time Zones时间处理 78% 2005-5-7
2352 Stars 81% 2005-5-7
2353 Ministry 71% 2005-5-4
2354 Titanic 80% 2005-5-2
2355 Railway tickets 62% 2005-5-5
2356 Find a multiple 71% 2005-5-1
2357 Labyrinth 47% 2005-5-2
2358 Queens in peaceful positions 62% 2005-5-2
2359 Questions 71% 2005-5-6
2360 Trains 81% 2005-5-4
2361 Tic Ta Toe 75% 2005-5-7
2362 Square 79% 2005-5-6
2363 Blocks 54% 2005-5-7
2364 Faucet Flow 83% 2005-5-4
2365 Rope 58% 2005-5-5
2366 Sacrament of the sum 83% 2005-4-28
2367 Genealogical tree 24% 2005-5-4
2368 Buttons 73% 2005-4-29
2369 Permutations 52% 2005-5-3
2370 Democracy in danger 19% 2005-5-4
2371 Questions and answers 33% 2005-5-7
2372 D++ Again 64% 2005-5-2
2373 Dividing the Path 72% 2005-5-1
2374 Fence Obstacle Course 67% 2005-5-1
2375 Cow Ski Area 82% 2005-5-7
2376 Cleaning Shifts 76% 2005-5-3
2377 Bad Cowtractors 65% 2005-5-3
2378 Tree Cutting 43% 2005-5-5
2379 ACM Rank Table模拟+排序 83% 2005-4-29
2380 Sales Report n/a 80% 2005-4-20
2381 Random Gap数论 84% 2005-5-1
2382 Radio Coverage 88% 2005-4-12
2383 Circle Drawing 94% 2005-5-1
2384 Harder Sokoban Problem 57% 2005-4-12
2385 Apple Catching DP(像NOI98“免费馅饼”) 65% 2005-5-1
2386 Lake Counting 53% 2005-5-7
2387 Til the Cows Come Home 83% 2005-5-3
2388 Who‘s in the Middle送分题(排序) 42% 2005-5-5
2389 Bull Math 52% 2005-5-7
2390 Bank Interest送分题 36% 2005-5-7
2391 Ombrophobic Bovines 71% 2005-5-4
2392 Space Elevator 73% 2005-5-6
2393 Yogurt factory 59% 2005-5-3
2394 Checking an Alibi 71% 2005-5-3
2395 Out of Hay图论->Dijkstra变形 70% 2005-5-6
2396 Budget 86% 2005-4-30
2397 Spiderman 71% 2005-5-2
2398 Toy Storage 46% 2005-5-2
2399 A Mayor Problem 92% 2005-4-23
2400 Supervisor, Supervisee图论->二分图的最大权匹配? 89% 2005-5-3
2401 Street Polygon 100% 2005-4-29
2402 Palindrome Numbers 66% 2005-5-7
2403 Hay Points送分题 28% 2005-5-7
2404 Jogging Trails 73% 2005-5-3
2405 Beavergnaw 29% 2005-5-7
2406 Power Strings 61% 2005-5-7
2407 Relatives 71% 2005-5-6
2408 Anagram Groups 88% 2005-5-5
2409 Let it Bead组合数学->Polya定理 54% 2005-5-6
2410 Simple Computers 82% 2005-5-5
2411 Mondriaan‘s Dream 50% 2005-5-6
2412 Equidistance 75% 2005-4-25
2413 How many Fibs? 75% 2005-5-6
2414 Phylogenetic Trees Inherited 58% 2005-5-5
2415 Hike on a Graph 44% 2005-5-6
2416 Return of the Jedi图论-> 69% 2005-5-5
2417 Discrete Logging数论 62% 2005-5-6
2418 Hardwood Species二分查找 80% 2005-5-7
2419 Forests枚举 70% 2005-5-6
2420 A Star not a Tree? 68% 2005-5-7
2421 Constructing Roads图论->最小生成树 74% 2005-5-7
2422 The Wolves and the Sheep 73% 2005-5-7
2423 The Parallel Challenge Ballgame几何 79% 2005-5-6
2424 Flo‘s Restaurant数据结构->堆 78% 2005-5-7
2425 A Chess Game博弈论 81% 2005-5-7
2426 RemainderBFS 91% 2005-5-7
2427 Smith‘s Problem 85% 2005-5-6
2428 Surface Reconstruction 62% 2005-5-7
2429 GCD & LCM Inverse 96% 2005-5-12
2430 Lazy CowsDP->数据压缩 52% 2005-5-12
2431 Expedition 81% 2005-5-12
2432 Around the world 64% 2005-5-11
2433 Landscaping 53% 2005-5-11
2434 Waves 50% 2005-5-11
2435 Navigating the City 33% 2005-5-12
2436 Disease Manangement 56% 2005-5-12
2437 Muddy roads 56% 2005-5-12