HDU 1042 N!

N!

Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 40204    Accepted Submission(s): 11162

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

 

 

Author

JGShining（极光炫影）

 

 

 

 

import java.util.*;
import java.math.*;

public class Main{
    public static void main(String[] args){
        Scanner cin = new Scanner(System.in);
        BigInteger ans;
        int n;
        while(cin.hasNext()){
            n = cin.nextInt();
            ans = BigInteger.valueOf(1);
            for(int i=2; i<=n; i++)
                ans = ans.multiply(BigInteger.valueOf(i));
            System.out.println(ans);
        }
    }
}