#include<iostream>
using namespace std;
int main() {
	int W, D;
	int power;
	cin >> W >> D;
	int i = D;
	while (i > 1) {
		//cout << "残り" << i << "日" << endl;
		power = W / (i*i);
		W -= power;
		//cout << "やる気" << power << endl;
		i--;
	}
	cout << W << endl;
}