#include <bits/stdc++.h> 

using namespace std;

int main() {
    double W, D; cin >> W >> D;
    double last;
    for (int i = 0; i < D; i++) {
        double work = W / ((D - i) * (D - i));
        if (i == D - 1)
            last = floor(work);
        W -= floor(work);
    }
    cout << last << endl;
}