#include <iostream>

using namespace std;
 
int main() {
  long w;
  long d;
  cin >> w;
  cin >> d;
  long work;
  long ans;
  for(long i = 0; i < d; i++) {
    work = w / ((d - i) * (d - i));
    ans = work;
    w -= work;
  }
  cout << ans << endl;
  return 0;
}