#include <bits/stdc++.h>

using namespace std;

#define rep(i,x) for(int i=0;i<x;++i)
#define rep1(i,x) for(int i=1;i<=x;++i)
#define fst first
#define scd second
#define int long long

signed main()
{
    int N, K; cin >> N >> K;

    cout << (N + K) / (K + 1) << endl;
}