hdu-1042-N!(大数)

发布时间：2020-12-14 03:04:10 所属栏目：大数据来源：网络整理

导读：N! Time Limit: 10000/5000 MS (Java/Others)????Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 54232????Accepted Submission(s): 15394 Problem Description Given an integer N(0 ≤ N ≤ 10000),your task is to calculate N! ? Inpu

N!

Time Limit: 10000/5000 MS (Java/Others)????Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 54232????Accepted Submission(s): 15394

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

Sample Output

  
  
   
   1
2
6
  
  
  
  

  
  
  
  
   
   代码:
  
  
  
  
   
   #include<stdio.h>
#include<string.h>
#define MAX 50000//数组要开合适,开到10000会wrong!!!! 开到1000000会超时!!!!!
int a[MAX];
int main()
{
   int n;
   while(~scanf("%d",&n))
   {
        memset(a,sizeof(a));
        a[0]=1;
        int i,j,d,c=0;
        for(i=2;i<=n;++i)
        {   c=0;
            for(j=0;j<MAX;++j)
            {
                d=a[j]*i+c;
                a[j]=d%10;
                c=d/10;
            }
        }
        while(c)
        {
            a[j++]=c%10;
            c=c/10;
        }
        for(j=MAX-1;j>0;--j)
        if(a[j]!=0)
        break;
        for(;j>=0;--j)
        printf("%d",a[j]);
        printf("n");
    }
    return 0;
}

（编辑：李大同）

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