# -*- coding: utf-8 -*-
"""
No.477 MVP
https://yukicoder.me/problems/no/477

"""
import sys
from sys import stdin
from math import ceil
input = stdin.readline


def solve(N, K):
    return N // ( K + 1) + 1


def main(args):
    N, K = map(int, input().split())
    ans = solve(N, K)
    print(ans)


if __name__ == '__main__':
    main(sys.argv[1:])