output_description: Print x rounded up to the nearest integer.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      a b
attempt: import sys
  
  
  ## io ##
  def IS():
      return sys.stdin.readline().rstrip()
  
  
  def II():
      return int(IS())
  
  
  def MII():
      return list(map(int, IS().split()))
  
  
  def MIIZ():
      return list(map(lambda x: x - 1, MII()))
  
  
  ## dp ##
  INIT_VAL = 0
  
  
  def DD2(d1, d2):
      return [[INIT_VAL] * d2 for _ in range(d1)]
  
  
  def DD3(d1, d2, d3):
      return [DD2(d2, d3) for _ in range(d1)]
  
  
  ## math ##
  MOD = 10**9 + 7
  
  
  def divc(x, y):
      return -(-x // y)
  
  
  def divf(x, y):
      return x // y
  
  
  def gcd(x, y):
      while y:
          x, y = y, x % y
      return x
  
  
  def lcm(x, y):
      return x * y // gcd(x, y)
  
  
  def get_primes(MAX_NUM=10**3):
      """Return a list of prime numbers"""
      is_prime = [True] * MAX_NUM
      is_prime[0] = False
      is_prime[1] = False
      primes = []
      for i in range(MAX_NUM):
          if is_prime[i]:
              primes.append(i)
              for j in range(2 * i, MAX_NUM, i):
                  is_prime[j] = False
      return primes
  
  
  ## libs ##
  from itertools import accumulate as acc
  from collections import deque, Counter
  from heapq import heapify, heappop, heappush
  from bisect import bisect_left
  
  # ======================================================#
  
  
  def main():
      a, b = MII()
      print(divc(a + b, 2))
  
  
  if __name__ == "__main__":
      main()
  
problem_description: Statement
  
  You are given two positive integers a and b. Let x be the average of a and b.
  Print x rounded up to the nearest integer.
samples: [{"input": "1 3", "output": "2\n    \n\nThe average of 1 and 3 is 2.0, and it will be rounded up to the nearest\ninteger, 2.\n\n* * *"}, {"input": "7 4", "output": "6\n    \n\nThe average of 7 and 4 is 5.5, and it will be rounded up to the nearest\ninteger, 6.\n\n* * *"}, {"input": "5 5", "output": "5"}]