N!

Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)

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

求10000以内的阶乘。java+暴力。。。
import java.io.*;
import java.util.*;
import java.math.*;
public class Main {
       public static void main(String[] args){
    	   Scanner in=new Scanner(System.in);
    	   int n,i;BigInteger ans,t;
    	   while(in.hasNext()){
    		   n=in.nextInt();
    		   ans=new BigInteger("1");
    		   for(i=1;i<=n;i++){
    			   t=new BigInteger(Integer.toString(i));
    			   ans=ans.multiply(t);
    		   }
    		   System.out.println(ans);
    	   }
       }
}