func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 2e7 + 7;   long long mn = (long long)(1e18 + 7), mx = -(long long)(1e18 + 7);   long long n, m, k, s, q, t;   long long a, b, c, d, e;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     cin >> n >> a >> b >> c >> d;     for (int i = 0; i <= N; i++) {       if (i * c <= n) mx = max(mx, i * a + ((n - i * c) / d * b));       if (i * d <= n) mx = max(mx, i * b + ((n - i * d) / c * a));     }     cout << mx;   }   