func_code_string: #include <bits/stdc++.h>   using namespace std;   const int INF = 99009000;   const long long MOD = 1000000007;   const int N = 100001;   int main() {     {       ios::sync_with_stdio(false);       cin.tie(nullptr);     };     long long a, b, w, x, c;     cin >> a >> b >> w >> x >> c;     long long A = a * w + b;     long long B = w * c;     long long dif = B - A;     if (dif <= 0)       cout << 0 <<   n ;     else       cout << (dif + w - x - 1) / (w - x) <<   n ;   }   