HDU 1042 N! 阶乘大数

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
   
   
代码：
   
   

   
   
<pre name="code" class="java">import java.util.Scanner;
import java.math.BigInteger;  
public class Main {
	public static void main(String[] args) {
		Scanner cin= new Scanner(system.in);  //加快啥的
          int i;    
          int t;
          while(cin.hasNext()) //多重输入
          {
        	  t=cin.nextInt();    	
        	   BigInteger res=BigInteger.ONE;  
          for(i=2;i<=t;i++)
          {
        	  res=res.multiply(BigInteger.valueOf((long)i));     //将i的类型改为long 
          }
        	  System.out.println(res);
          }
	}
}

   又一次证明JAVA的重要性  瞬间变水题啊 有木有。。