#include <stdio.h>
#include <algorithm>
#include <vector>
#include <deque>
#include <string>
#include <iostream>
using namespace std;
using ll = long long;

void solve();
int main() {
	solve();
#ifdef DBG
	while (true);
#endif
}

//477
void solve() {
	ll n, k;
	scanf("%lld %lld", &n, &k);
	printf("%lld\n", n / (k + 1) + 1);
}