#include <bits/stdc++.h>
using namespace std;
long long s, ans;

int main() {
	long long n, m;
	cin >> n >> m;
	s = n;
	for (long long i = 1; i <= n; i++) {
		s = s + m;
		if (n == 1) {
			cout << s;
			return 0;
		} else {
			s *= n;
			i++;
		}
	}
	s /= n;
	cout << s;
	return 0;
}