func_code_string: #include <bits/stdc++.h>   using namespace std;   int dp[123000];   int n, m;   long long d, k, a, b, t;   void input() {}   void solve() {     long long ans = 0;     if (d <= k) {       ans = (long long)a * (long long)d;       printf( %lld n , ans);       return;     }     d -= k;     ans += (long long)a * (long long)k;     long long i = (long long)(a - b) * (long long)k + (long long)t;     if (i >= 0) {       ans += (long long)b * (long long)d;     } else {       long long x = d / k;       long long s = (long long)d - x * (long long)k;       long long j1 = x * i + (long long)b * (long long)d;       long long j2 = ((long long)a * (long long)k + (long long)t) * x +                      (long long)t + (long long)a * s;       ans += j1 < j2 ? j1 : j2;     }     printf( %lld n , ans);   }   int main() {     while (scanf( %lld %lld %lld %lld %lld , &d, &k, &a, &b, &t) != EOF) {       solve();     }     return 0;   }   