def solve(H, A):
  slimes = {H: 1}
  ans = 0
  nxt = {}
  while slimes:
    for s in slimes:
      at = s // A
      if at > 0:
        if at not in nxt: nxt[at] = 0
        nxt[at] += slimes[s] * 2
      ans += slimes[s]
    slimes = nxt
    nxt = {}
  return ans
    
H, A = [int(x) for x in input().split()]
print(solve(H, A))