func_code_string: #include <bits/stdc++.h>   using namespace std;   const int oo = 0x3f3f3f3f;   const double eps = 1e-9;   const int maxn = 20000000 + 20;   long long dp[maxn];   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     long long n, x, y;     cin >> n >> x >> y;     memset(dp, oo, sizeof dp);     dp[1] = x;     dp[2] = x + y;     for (int i = 2; i <= n; ++i) {       dp[i] = min(dp[i], dp[i - 1] + x);       dp[i] = min(dp[i], dp[i + 1] + x);       dp[2 * i] = min(dp[2 * i], dp[i] + y);       dp[2 * i - 1] = min(dp[2 * i - 1], dp[2 * i] + x);     }     cout << dp[n] << endl;     return 0;   }   