#include <iostream>
using namespace std;
int power(int a, int b) //幂运算
{
int res = 1;
while (b -- ) res *= a;
return res;
}
int main()
{
int k, n;
cin >> k >> n;
int res = 0;
for (int i = 0; i < 10; i ++ )
if (n >> i & 1) //类似快速幂,二进制表示中哪几位是1就用哪几位来幂运算累加
res += power(k, i);
cout << res << endl;
return 0;
}