<span>codeforces710E Generate a String（dp）</span>

/* ***********************************************
Author        :devil
************************************************ */
#include <cstdio>
#include <cstring>
#include <iostream>
#include <algorithm>
#include <vector>
#include <queue>
#include <set>
#include <stack>
#include <map>
#include <string>
#include <cmath>
#include <stdlib.h>
#define LL long long
#define rep(i,a,b) for(int i=a;i<=b;i++)
#define dep(i,a,b) for(int i=a;i>=b;i--)
#define ou(a) printf("%d\n",a)
#define pb push_back
#define mkp make_pair
template<class T>inline void rd(T &x)
{
    char c=getchar();
    x=0;
    while(!isdigit(c))c=getchar();
    while(isdigit(c))
    {
        x=x*10+c-'0';
        c=getchar();
    }
}
#define IN freopen("in.txt","r",stdin);
#define OUT freopen("out.txt","w",stdout);
using namespace std;
const int inf=0x3f3f3f3f;
const int mod=1e9+7;
const int N=1e7+10;
LL dp[N],n,x,y;
int main()
{
    #ifndef ONLINE_JUDGE
    IN
    #endif
    rd(n),rd(x),rd(y);
    dp[1]=x;
    for(int i=2;i<=n;i++)
    {
        dp[i]=dp[i-1]+x;
        if(i&1) dp[i]=min(dp[i],dp[i/2+1]+x+y);
        else dp[i]=min(dp[i],dp[i>>1]+y);
    }
    printf("%I64d\n",dp[n]);
    return 0;
}