func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, m, a, b;     cin >> n >> m >> a >> b;     int x = m - n, r = 0, t = 14;     if (b >= a && a * 8 < x) {       cout << -1;       return 0;     }     while (x > 0) {       if (10 <= t && t < 22)         x -= a;       else         x += b;       t++;       if (t == 24) r++, t = 0;     }     cout << r;   }   