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

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

  for (long day = D; day > 1; --day) {
    W -= W / (day * day);
  }

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