from math import ceil

from statistics import mean

a = list(map(int,input().split()))

print((ceil(mean(a))))
import math

a,b = list(map(int,input().split()))

print((math.ceil((a+b)/2)))
from math import ceil
from statistics import mean

a = list(map(int, input().split()))
print((ceil(mean(a))))

import math

a, b = list(map(int, input().split()))
print((math.ceil((a + b) / 2)))

-from math import ceil -from statistics import mean +import math -a = list(map(int, input().split())) -print((ceil(mean(a)))) +a, b = list(map(int, input().split())) +print((math.ceil((a + b) / 2)))