#include "iostream"
#include "climits"
#include "list"
#include "queue"
#include "set"
#include "functional"
#include "algorithm"
#include "math.h"
#include "utility"

using namespace std;
const long long int MOD = 1000000007;


long long int N,K;
long long int num;
long long int sum;

int main() {
	cin >> N>>K;
	cout << N / (K+1) + 1<<endl;
	return 0;
}