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

int main() {
  unsigned long long H, A;
  cin >> H >> A;
  unsigned long long k = 0;
  unsigned long long j = 1;
  unsigned long long a;
  for (int i = 0; i < 1;) {
    k += j;
    j *= 2;
    a = H / A;
    H = a;
    if (a == 0) {
      i++;
    }
  }
  cout << k << endl;
}