Go: package main

import "fmt"

func main() {
	var num1, num2 int
	fmt.Scan(&num1, &num2)

	fmt.Println((num1 + num2) / 2)
}

Python: # coding=utf-8

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

Python: a,b = map(int,input().split())
import math
print(math.floor((a+b)/2))

Python: a, b = map(int, input().split())
print((a+b)>>1)

Python: a, b = map(int,input().split())
print((a+b)//2)

Python: a, b = map(int, input().split())
print((a+b)//2)

Python: # coding=utf-8

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

Python: a,b = (int(x) for x in input().split())
print(round((a + b) / 2))

Python: a, b = map(int, input().split())

print((a + b) // 2)

Python: a,b=map(int,input().split())

c=(a+b)/2
c=int(c)

print(c)

Python: a,b=map(int,input().split())
if 1000<=a<=50000 and 1000<=b<=50000:
    print((a+b)//2)

Python: a,b=map(int,input().split())
print ((a+b)//2)

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

Python: print(sum(map(int,input().split()))/2)

Python: a,b = input().split()
c=int((int(a)+int(b))/2)
print(c)

Python: a,b=map(int,input().split())
print(int((a+b)/2))

Python: a,b = map(int,input().split())
print((a+b)//2)

Python: a, b = map(int,input().split())
print((a+b)//2)

Python: s = input().split( )
a = int(s[0])
b = int(s[1])
print((a+b)//2)

Python: a,b=map(int,input().split())
print(int((a+b)/2))

Python: a, b = map(int, input().split())
print((a + b)/2)

Python: a,b=map(int,input().split())
print(int((a+b)/2))

Python: a,b=map(int,input().split())
print(round((a+b)/2))

Python: # coding: utf-8
# Your code here!

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

Python: a, b = map(int, input().split())
print((a + b)//2)

Python: a,b=map(float,input().split())
print(int((a+b)/2))

Python: print(int(sum(list(map(int,input().split()))) / 2)) #標準入力をして、リスト化して、リストを合計して、2で割って出力する

Python: a,b=map(int,input().split())
print(int((a+b)/2))

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a,b=map(int,input().split())
print(int((a+b)/2))

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a,b =map(int,input().split())
c=(a+b)/2
c=int(c)
print(c)

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a,b = map(int,input().split())
print('{:.0f}'.format((a+b)/2))

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a,b=map(int,input().split())
c=(a+b)/2
print(int(c))

Python: a,b = map(int,input().split())
print((a + b)//2)

Python: a, b = [int(x) for x in input().split()]
print((a+b)//2)

Python: a,b = map(int,input().split())
x = (a+b)//2
print(x)

Python: a, b = map(int, input().split())

print(int((a + b) / 2))

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a, b = map(int, input().split())
print((a+b)//2)

Python: a,b=map(int,input().split())

c=int((a+b)/2)

print(c)

Python: a,b=(int(x) for x in input().split())

if 1000<=a<=50000 and 1000<=b<=50000 and a%1000==0 and b%1000==0:
   print(int((a+b)/2))
else:
   pass

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a, b=map(int,input().split())
x=(a+b)//2
print(x)

Python: a,b=map(int,input().split())
print(int((a+b)*1/2))

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a,b=map(int,input().split())

print((a+b)//2)

Python: a,b=map(int,input().split())
print(int((a+b)/2))

Python: a, b = map(int, input().split())
print((a + b) // 2)

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: import math
a , b = map(int,input().split())
x=(a+b)/2
X=math.floor(x)
print(X)

Python: a,b=map(int,input().split())
print(int((a+b)/2))

Python: a,b=map(int,input().split())
print(int((a+b)/2))

Python: a,b=map(int,input().split())

print((a+b)//2)

Python: a, b = map(int, input().split())
c=(a+b)//2
print(c)

Python: 
a,b=map(int,input().split())

c=(a+b)/2
print(int(c))

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a, b = map(int, input().split())
print((a + b)//2)

Python: a,b = map(int,input().split())
x = int((a+b)/2)
print(x)

Python: a,b = map(int,input().split())
print((a+b)//2)

Python: a,b=map(int,input().split())

print(int((a+b)/2))

Python: print(sum(map(int, input().split())) // 2)

Python: a,b = map(int, input().split())
print((a+b)//2)

Python: a, b = map(int, input().split())
print((a+b)//2)

Python: print(sum(map(int,input().split()))//2)

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: # coding: utf-8
# Your code here!

a,b=map(int,input().split())
A = int((a+b)/2)

print('%d'%A)

Python: l = raw_input().split()

print (l[0] + l[1] / 2)

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a, b = map(int, input().split())
cash = (a+b)//2
print(cash)

Python: l = input().split()
a = int(l[0])
b = int(l[1])
print ((a+b)//2)

Python: a, b = map(int, input().split())
print((a+b)//2)

Python: print(sum([int(s) for s in input().split()])//2)

Python: a,b = map(int,input().split())
print(int((a+b)/2))

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a,b=map(int,input().split())
print(int((a+b)/2))

Python: def main():
    a,b = map(int, input().split())
    print(int((a + b) / 2))

if __name__ == "__main__":
    main()

Python: print(sum(map(int,input().split()))//2)

Python: a,b=map(int,input().split())
print(int((a+b)/2))

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a,b = map(int,input().split())
print((a + b)//2)

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a, b = map(int, input().split())
print((a+b) // 2)

Python: a,b=map(int,input().split())
print(int((a+b)/2))

Python: a,b=map(int,input().split())
print(int((a+b)/2))

Python: a,b=map(int,input().split())
n=(a+b)//2 #//と/の違い
print(n)

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a,b=map(int,input().split())
if 1000<=a<=50000 and 1000<=b<=50000:
    print(int((a+b)/2))
else:
    pass

Python: a,b=map(int,input().split())
c=a+b
d=c/2
print(int(d))

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a,b=map(int,input().split())
x=int((a+b)/2)
print(x)

Python: a,b=map(int,input().split())

print(int((a+b)/2))

Python: a,b = input().split()
a = int(a)
b = int(b)
print((a + b)//2)

Python: a,b=map(int,input().split())
print(int((a+b)/2))

Python: a, b= map(int, input().split())
print(int((a+b)/2))

Python: a,b=map(int,input().split())
print(int((a+b)/2))

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

Python: s = list(map(int,input().split()))
avr = int((s[0] + s[1])/2)
print (avr)

Python: a,b=map(int,input().split())
print(int((a+b)*1/2))

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a,b=map(int,input().split())
print(int((a+b)/2))

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a,b=map(int,input().split())
print(int((a+b)/2))

Python: import math
a,b = map(int,input().split())
print(math.floor((a + b)/2))

Python: a , b = map(int,input().split())
print((a + b) // 2)

Python: a, b = map(int, input().split())
print(int((a+b)/2))

Python: a,b=map(int, input().split())
print((a+b)//2)

Python: a, b = input().split(" ")

a = int(a)
b = int(b)

print(a / b)

Python: # coding: utf-8
# Your code here!
a,b=map(int,input().split())

print(int((a+b)/2))

Python: a,b=map(int,input().split())
print(int((a+b)/2))

Python: a,b=map(int,input().split())
if 1000<=a<=50000 and 1000<=b<=50000:
    print(int((a+b)/2))
else:
    pass

Python: a,b=map(int,input().split())

print(round((a+b)/2))

Python: a, b = map(int, input().split())
print((a+b)//2)

Python: # coding: utf-8
# Your code here!

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

Python: a,b=map(int,input().split())
print((a+b)//2)

Python: a,b= map(int,input().split())

print(int((a+b)/2))

Python: a,b = map(int,input().split())
c = int((a+b)/2)
print(c)

Python: a,b=map(int,input().split())
x=(a+b)//2
print(x)

Python: print(sum(map(int,input().split()))//2)

Python: a,b=map(int,input().split())
print((a+b)//2)