#include <iostream>

using namespace std;

long long W, D;

int main() {
    cin >> W >> D;
    for (long long i = 0; i < D - 1; i++) {
        W -= W / ((D - i) * (D - i));
        if (W == 0) {
            cout << 0 << endl;
            return 0;
        }
    }
    cout << W << endl;
    return 0;
}