//丹阳新区实小路彦
#include <bits/stdc++.h>
using namespace std;

const int N = 1010;
long long int p[N];

int main()
{
    int k, n;
    cin >> k >> n;
    p[0] = 1;
    for (int i = 1; i <= n; i++)
        p[i] = p[i - 1] * k;
    int cot = n;
    long long int ans = 0;
    for (int i = 0; i < 32; i++)
        if ((cot >> i)& 1) ans += p[i];
    cout << ans << endl;
    return 0;
}