#include<iostream>
using namespace std;
int main(void)
{
	int w, d, p, i;
	cin >> w >> d;

	for (i = 0; i < d - 1; i++) {
		p = w / ((d - i)*(d - i));
		w = w - p;
	}
	cout << w << endl;

	return 0;
}