POJ 2562

 #include<iostream>
 #include<algorithm>
 #define MAXN 15
 using namespace std;

 //int rec[MAXN];

 int main()
 {
     //freopen("acm.acm","r",stdin);
     int ans;
     int x;
     int y;
     int dight_x;
     int dight_y;
     int i;
     int rec;
     while(cin>>x>>y)
     {
         if(!x&&!y)
             break;
         ans = ;
         i = ;
         rec = ;
         while(y||x)
         {
             dight_x = x%;
             dight_y = y%;
             x /= ;
             y /= ;
             if(rec + dight_x + dight_y > )
             {
                 rec = ;
                 ++ ans;
             }
             else
                 rec = ;
         }
         if(ans == )
             cout<<"No carry operation."<<endl;
         else if(ans > )
             cout<<ans<<" carry operations."<<endl;
         else
             cout<<ans<<" carry operation."<<endl;
     }
 }