HDU-1042-N!(Java大法好 && HDU大数水题)

N!

Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)
Total Submission(s): 64256    Accepted Submission(s): 18286

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）

 

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Java大法好，退C保平安.......开玩笑的，Java和C各有各的优劣势，缺一不可！我不会大数模版，就用BigInteger了，HDU大数水题不解释！

import java.io.*;
import java.math.BigInteger;
import java.util.*;

public class Main
{

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

}