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