func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 2e5 + 5, inf = 0x3f3f3f3f;   int main() {     int a, b, h1, h2;     while (cin >> h1 >> h2) {       cin >> a >> b;       int add = a * 12, de = b * 12, first = 8 * a;       if (a <= b) {         if (h1 + first >= h2)           puts( 0 );         else           puts( -1 );         continue;       }       int ans = 0;       h1 += first;       if (h1 >= h2)         puts( 0 );       else {         add -= de;         ans += (h2 - h1) / add;         if ((h2 - h1) % add) ans++;         printf( %d n , ans);       }     }     return 0;   }   