> #include <iostream>
> using namespace std;
> int main()
> {
>     long long a,b,carry=0;
>     while(cin>>a>>b&&(a&&b))
>     {
>         carry=0;
>         while(a&&b)
>         {
>             if(a%10+b%10>9)
>             {
>                 carry++;
>                 a+=10;
>             }
>             a/=10;b/=10;    
>         }
>         if(!carry)
>         {
>             cout<<"No carry operation."<<endl;
>         }    
>         else if(carry==1)
>             cout<<"1 carry operation."<<endl;
>         else cout<<carry<<" carry operations."<<endl;
>     }
>     return 0;
> }