杭电1042N！

N!

Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others)
Total Submission(s): 70502 Accepted Submission(s): 20194

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

123

Sample Output

126

Author

JGShining（极光炫影）

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数组开的过大造成超时

#include<stdio.h>#include<string.h>int main(){int n,i,j;int a[50000];while(~scanf("%d",&n)){memset(a,0,sizeof(a));a[0]=1;for(i=2;i<=n;i++){int s;  int c=0;      for(j=0;j<50000;j++)       {    s=i*a[j]+c;    a[j]=s%10;    c=s/10;   }  }    for(i=49999;i>=0;i--)    if(a[i])  break;    for(;i>=0;i--)    printf("%d",a[i]);    printf("\n");  }  return 0;  }