func_code_string: #include <bits/stdc++.h>   using namespace std;   using ll = long long;   using ld = long double;   int main() {     ios_base::sync_with_stdio(0);     cout.tie(0);     cin.tie(0);     int q;     cin >> q;     for (int i = 0; i < q; i++) {       ll k, n, a, b;       cin >> k >> n >> a >> b;       if (k - n * b <= 0) {         cout << -1 <<   n ;         continue;       }       ll l = -1, r = n;       while (r - l > 1) {         ll m = (l + r) / 2;         if (k - m * b - (n - m) * a > 0) {           r = m;         } else {           l = m;         }       }       cout << n - r <<   n ;     }   }   