N!

Time Limit: 10000/5000 MS (Java/Others)????Memory Limit: 262144/262144 K (Java/Others)
Total Submission(s): 75069????Accepted Submission(s): 21870

  
  
   
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java大法好~~~

import java.math.BigInteger;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sca=new Scanner(System.in);
		BigInteger res[]=new BigInteger[10000+10];
		res[0]=BigInteger.ONE;
		for(int i=1;i<10000+1;i++){
			res[i]=res[i-1].multiply(BigInteger.valueOf(i));
		}
		while(sca.hasNext()){
			int x=sca.nextInt();
			System.out.println(res[x]);
		}
	}

}

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