#include <iostream>
using namespace std;

typedef long long ll;

ll W, D;

void Solve() {
    for (int i = 0; i < D - 1; i++) {
        W = max((ll)0, W - W / ((D - i) * (D - i)));
    }
    cout << W << endl;
}

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

    Solve();
    return 0;
}