A+B problem

#include <bits/stdc++.h>
#define llong long long
using namespace std;

int a, b;
int binplus(int a, int b) {
    if(!b)  return a;
    if(b % 2 == 0) {
            int res = binplus(a, b / 2);
            return res + b / 2;
    }
    else {
        return binplus(a, b - 1) + 1;
    }
}

int main() {
    cin >> a >> b;
    if(a < 0 && b < 0) a = -a, b = -b, cout << '-';
    else if(b < 0) swap(a, b);
    cout << binplus(a, b);
    return 0;
}