#include <bits/stdc++.h>
using namespace std;
typedef int64_t lint;

int main()
{
    lint w, d;
    cin >> w >> d;
    lint s;
    for (int i = 1; i < d; i++)
    {
        w -= w / ((d - i + 1) * (d - i + 1));
    }
    cout << w << endl;
    // system("pause");
}