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.
a, b = map(int, input().split())
if (a + b)%2 == 0:
  print((a+b)/2)
else:
  print(((a+b)/2) + 0.5)
a, b = map(int, input().split())
if (a + b) % 2 == 0:
  print((a+b)//2)
else:
  print((a+b+1)//2)