#include <bits/stdc++.h>
using namespace std;
template <class T>
T &get(T &n) {
  cin >> n;
  return n;
}
const int MAXN = 10000007;
long long dp[MAXN];
bool done[MAXN];
struct Comp {
  bool operator()(long long x, long long y) const { return dp[x] > dp[y]; }
};
int main() {
  int n, x, y;
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  cin >> n >> x >> y;
  dp[1] = x;
  for (int i = 2; i < MAXN; ++i) {
    dp[i] = dp[i - 1] + x;
    long long extra = (i & 1) ? x : 0;
    dp[i] = min(dp[i], dp[(i + 1) / 2] + y + extra);
  }
  cout << dp[n] << "\n";
  return 0;
}
