#include<iostream>
#include<string>
#include<algorithm>
#include<cmath>
#include<iomanip>
#include<cstring>
#include<map>
#include<vector>
#include<queue>
#include<climits>
using namespace std;
typedef long long int ll;

int main(){

	ll n, k;
	cin >> n >> k;
	cout << n/(k+1)+1 << endl;
  
  return 0;
}