1842238_ac_0ms_24k.c

北大大牛代码 1240道题的原代码 超级权威

# include <stdio.h>

void main()
{
 int i, NO, tmp, a[101];
 while(1)
 {
   scanf("%d",&tmp);
   if(tmp == -1) break;
   NO = 0;
   for(i = 0; i < 101; i++)
     a[i] = 0;
   a[tmp] = 1;
   while(scanf("%d",&tmp)==1&&tmp)
     a[tmp] = 1;
   for(i = 0; i < 50; i++)
    if(a[i]&&a[2*i])
     NO++;
     printf("%d\n",NO);
 }
}