#include <iostream>

bool yfy(int nam, int n);

using namespace std;

int main() {
    int n = 3;
    int nam = 0;
    for (int i = 0; i < n; ++i) {
        cout << endl;
        cout << i+1;
        cout << " nam ";
        cout << ": ";
        int t;
        cin >> t;
        nam += t;
    }
    cout << endl;
    cout  << "sum: ";
    cout<< nam;

    if (yfy(nam, n)) {
        cout << endl;
        cout << "+ nam";
    } else {
        cout << endl;
        cout << "- nam";
    }

}

bool yfy(int nam, int n) {
    if (nam == n) {
        return true;
    }
    return false;
}