import sys
a,b = map(int,sys.stdin.readline().split())
n = 0
for i in range(a,b+1):
if i % 2 == 0:
n += 1
print(n)

import sys
a,b = map(int,sys.stdin.readline().split())
n = 0
for i in range(a,b+1):
if i % 2 == 0:
n += 1
print(n)