text: # ABC153a
  
  
  def main():
      import sys
      input = sys.stdin.readline
      sys.setrecursionlimit(10**6)
  
      h, a = map(int, input().split())
  
      from math import ceil
  
      print(ceil(h/a))
  
  
  if __name__ == '__main__':
      main()
  