#include <iostream>

using namespace std;
 
int main() {
  int w, d;
  cin >> w, d;
  int day = d;
  int work;
  int ans;
  for(int i = 0; i < d; i++) {
    work = w / (day * day);
    if(i == d - 1) {
      ans = work;
    } else {
      w -= work;
      day--;
    }
  }
  cout << ans << endl;
  return 0;
}