adunare

#include <iostream>
using namespace std;
int A[10],B[10];

int main()
{
    int a,b;
    cin>>a>>b;
    int x=a,n=0,m=0;
    while(x)
        A[n++]=x%10,x/=10;
    --n;
    x=b;
    while(x)
        B[m++]=x%10,x/=10;
    int T=0;
    --m;
    if(m>n) /// Daca b are mai multe cifre decat a
        for(int i=n;i<m;++i) /// adaugam zerouri in fata
            A[i]=0;
    else /// a are mai multe cifre decat b
        for(int i=n;i<m;++i)
            B[i]=0;
    for(int i=0;i<n;++i)
    {
        A[i]+=B[i]+T;
        T=A[i]/10;
        if(T)
        {
            cout<<"Gigel nu stie! El poate cumpara "<<1ULL*a+1ULL*b<<" bomboane!\n";
            return 0;
        }
        A[i]%=10;
    }
    if(T)
        cout<<"Gigel nu stie! El poate cumpara "<<1ULL*a+1ULL*b<<" bomboane!\n";
    else
        cout<<"Gigel stie!\n";
    return 0;
}