#include<stdio.h>

int main()
{
    int n,k,i,w,t;
    _int64 a,b;

    scanf("%d%d",&n,&k);
    while(1)
    {
         if ((n==0)&&(k==0)) break;
         a=1;
         b=1;
         if (k>(n/2)) 
         k=n-k;
         for (i=n;i>=n-k+1;i--)
         a*=i;
         for (i=2;i<=k;i++)
         b*=i;
         printf("%I64d\n",a/b);
         scanf("%d%d",&n,&k);
    }
    
    return 0;
}

• Re:求大牛指点为什么会WA (469) CCUT2015_wangzhao 2014-10-29 16:00:40
  • Re:求大牛指点为什么会WA (8) CCUT2015_wangzhao 2014-10-29 16:01:37
• Re:求大牛指点为什么会WA (502) 3013216027 2015-01-25 09:51:55