Posted on 2010-08-22 21:21
acronix 阅读(421)
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zhaoboqiang解题报告
N!
Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 17754 Accepted Submission(s): 4605
Problem Description
Given an integer N(0 ≤ N ≤ 10000), your task is to calculate N!
Input
One N in one line, process to the end of file.
Output
For each N, output N! in one line.
Sample Input
1
2
3
Sample Output
1
2
6
Java解高精度的题目还是很爽的，注意类名要写成Main，
Compilation Error了n次。
import java.math.*;
import java.util.*;
public class Main 
{
public static BigInteger num;
public static void main(String args[]) {
Scanner cin = new Scanner(System.in);
while (cin.hasNext()) {
num = BigInteger.ONE;
int n = cin.nextInt();
num = BigInteger.ONE;
for (int i = 1; i <= n; i++) {
num= num.multiply(BigInteger.valueOf(i));
}
System.out.println(num);
}
}
}