#include<iostream>
#include<cmath>
using namespace std;

int qmi(int k, int an)
{
    int res = 1;
    for(; an > 0; an = an >> 1)
    {
        if(an & 1) res = res * k;
        k = k * k;
    }
    return res;
}

int main()
{
    int k, n;
    cin >> k >> n;

    int r = 1, an = 0;
    int res = 0;
    while(n)
    {
        if(n & 1) res = res + qmi(k, an);
        an++; 
        n = n >> 1; 
    }

    cout << res << endl;

    return 0;
}