func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int k, a, b;     cin >> k >> a >> b;     if (a / k + b / k && a % k <= (b / k) * (k - 1) && b % k <= (a / k) * (k - 1))       cout << a / k + b / k <<   n ;     else       cout <<  -1 n ;     return 0;   }   