#include<iostream>using namespace std; int main(){ int n,m,c,t; while(cin>>n>>m&&n&&m) { c=t=0; if(n<m){ n=n+m;m=n-m;n=n-m; } while(m>0) { if(m%10 + n%10 + c >9 ){ c=1; ++t;} else c=0; m/=10; n/=10; } while(n>0) { if(n%10 + c > 9){c=1;++t;} else c=0; n/=10; } if(!t)cout<<"NO carry operation."<<endl; else if(t==1)cout<<t<<" carry operation."<<endl; else cout<<t<<" carry operations."<<endl; } return 0;} /************************************************************** Problem: 1143 User: 3011216016 Language: C++ Result: Accepted Time:0 ms Memory:1520 kb****************************************************************/