#include <iostream>
#include <cmath>
using namespace std;

int DP(int W, int D)
{
	if (D <= 1)
		return W;

	return DP(W - floor(W / pow(D, 2)), D - 1);
}

int main()
{
	int W, D;
	cin >> W >> D;

	cout << DP(W, D) << endl;

	return 0;
}