#include<stdio.h> #include<iostream.h> int main() {   int n[15],i=0,j,twice=0;   cin>>n[i];   while(n[i]!=-1)     {       cin>>n[++i];       if(n[i]==0)     {           cout<<twice<<endl;       twice=0;       i=0;       cin>>n[i];     }      else     {       for(j=0;j<i;j++)          {         if(n[j]==2*n[i]||n[i]==2*n[j])         twice++;          }     }     } return 0; }

评论