#include<string>
#include<iostream>
#include<algorithm>
#include<set>
#include<unordered_set>
#include<math.h>
#include<vector>
#include<sstream>
#include<queue>
#include<functional>
#include<bitset>
#include<cstdio>
#include<iomanip>
#include <cstring>
#include <climits>
using namespace std;
#define rep(i,n) for(int (i)=0;(i) < (n); (i)++)
#define FIND(v, k) find((v).begin(), (v).end(), k)
#define MAX 101
#define MAX_V 15
#define mset(a,x) memset(a,x,sizeof(a))
int main() {
	long long n, k,res;
	cin >> n >> k;
	cout << n / (k + 1) + 1 << endl;
	return 0;
}