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