# from math import ceil
# a = int(input("Klass a:"))
# b = int(input("Klass b:"))
# c = int(input("Klass c:"))

# klassa=ceil(a/2)
# klassb=ceil(b/2)
# klassc=ceil(c/2)
# l = (klassa+klassb+klassc)

# print("%s"%l)

