#include <bits/stdc++.h>
#define rep(i, ns, ne) for (ull i = ns; i < ne; ++i)
using namespace std;
using ull = unsigned long long;

int main() {
  ull a, b, ans;
  cin >> a >> b;
  ans = 1 + a / b;
  cout << ans << endl;
  getchar();
}