#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main() {
  ll w, d;
  cin >> w >> d;
  ll ans = -1;
  while (d > 0) {
    ans = w / (d * d);
    d--;
    w -= ans;
  }
  cout << ans << '\n';
  return 0;
}