#include <bits/stdc++.h>

using namespace std;

#define INF 2000000000
#define MOD 1000000007
typedef long long ll;
typedef pair<int, int> P;


int main()
{
	ll n, k;
	cin >> n >> k;
	ll ret = n / (k+1) + 1;
	cout << ret << endl;

}