#include <bits/stdc++.h>
#define fastIO (cin.tie(0), cout.tie(0), ios::sync_with_stdio(false))
using namespace std;

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

  for (int day = 0; day < D - 1; ++day) {
    int d = D - day;
    W -= W / (d * d);
  }

  cout << W << '\n';
  return 0;
}