func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int ntests;     cin >> ntests;     while (ntests--) {       int n, k, a, b;       cin >> k >> n >> a >> b;       if (k <= 1ll * n * b)         cout << -1 << endl;       else {         long long x = (k - 1ll * n * b - 1) / (a - b);         if (x > n) x = n;         cout << x << endl;       }     }   }   