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#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
/*
离散化的思想。映射到2进制（不会改变任何一位的顺序，
因为k>3 题意那些k进制表达的数严格单调，就像1100 >1011 每位都是排好顺序），
然后看它二进制表示中每一位是1还是0，然后再逆映射回十进制.
*/
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;
