#include <iostream>

using namespace std;
using LL = long long;

constexpr LL c = 1000000L;

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


    for (LL i = D; i > 1; i--) {
        W -= (W * c) / (i * i) / c;
    }

    cout << W << endl;
}