今天水了一道水题，下标不是从0开始的，开始没注意，WA到吐血
http://acm.hust.edu.cn:8080/judge/problem/viewProblem.action?id=23130#include<cstdio>
#include<cstring>
#include<algorithm>
#include<cstdlib>
using namespace std;
int main()
{
int n;
scanf("%d",&n);
int cb[50];
int vis[3][10000];
memset(cb,0,sizeof(cb));
memset(vis,0,sizeof(vis));
int a,b;
for(int i=0; i<n; ++i)
{
scanf("%d%d",&a,&b);
cb[a]=b;
vis[0][b]=1;
vis[1][a-b+100]=1;
vis[2][a+b]=1;
}
int cnt=0;
for(int i=1; i<=n-2; ++i)
for(int j=i+1; j<=n-1; ++j)
for(int k=j+1; k<=n; ++k)
{
int tmp1=cb[i];
int tmp2=cb[j];
int tmp3=cb[k];
vis[1][i-tmp1+100]=0;
vis[1][j-tmp2+100]=0;
vis[1][k-tmp3+100]=0;
vis[2][i+tmp1]=0;
vis[2][j+tmp2]=0;
vis[2][k+tmp3]=0;
if(!vis[1][i-tmp2+100]&&!vis[2][i+tmp2])
{
vis[1][i-tmp2+100]=vis[2][i+tmp2]=1;
if(!vis[1][j-tmp3+100]&&!vis[2][j+tmp3])
{
vis[1][j-tmp3+100]=vis[2][j+tmp3]=1;
if(!vis[1][k-tmp1+100]&&!vis[2][k+tmp1])
{
vis[1][k-tmp1+100]=vis[2][k+tmp1]=1;
cnt++;
vis[1][k-tmp1+100]=vis[2][k+tmp1]=0;
}
vis[1][j-tmp3+100]=vis[2][j+tmp3]=0;
}
vis[1][i-tmp2+100]=vis[2][i+tmp2]=0;
}
if(!vis[1][i-tmp3+100]&&!vis[2][i+tmp3])
{
vis[1][i-tmp3+100]=vis[2][i+tmp3]=1;
if(!vis[1][j-tmp1+100]&&!vis[2][j+tmp1])
{
vis[1][j-tmp1+100]=vis[2][j+tmp1]=1;
if(!vis[1][k-tmp2+100]&&!vis[2][k+tmp2])
{
vis[1][k-tmp2+100]=vis[2][k+tmp2]=1;
cnt++;
vis[1][k-tmp2+100]=vis[2][k+tmp2]=0;
}
vis[1][j-tmp1+100]=vis[2][j+tmp1]=0;
}
vis[1][i-tmp3+100]=vis[2][i+tmp3]=0;
}
vis[1][i-tmp1+100]=1;
vis[1][j-tmp2+100]=1;
vis[1][k-tmp3+100]=1;
vis[2][i+tmp1]=1;
vis[2][j+tmp2]=1;
vis[2][k+tmp3]=1;
}
printf("%d\n",cnt);
return 0;
}
posted on 2011-09-08 17:37
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