#include <cstdio>
#include <cstdlib>
#include <cstddef>
#include <vector>
#include <algorithm>
#include <cmath>
#include <string>
#include <iostream>
#include <iomanip>
#define L64 long long
#define ASDF (1000000007LL)
#define MODADD(A, B) (A = (A + B) % ASDF)

int main(void)
{
  L64 n, k;
  std::cin >> n >> k;
  std::cout << n / (k + 1LL) + 1LL << std::endl;
  return 0;
}