#include <iostream>
using namespace std;
typedef long long LL;
LL get(int a, int b)
{
LL res = 1;
while (b -- ) res *= a;
return res;
}
int main()
{
int n, k;
cin >> k >> n;
LL res = 0;
for (int i = 0; i < 20; i ++ )
if (n >> i & 1)
res += get(k, i);
cout << res << endl;
return 0;
}