Problem:
Score : 100 points

Problem Statement

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.

Constraints

a and b are integers.

1 \leq a, b \leq 100

Input

Input is given from Standard Input in the following format:

a b

Output

Print x rounded up to the nearest integer.

Sample Input 1

1 3

Sample Output 1

2

The average of 1 and 3 is 2.0, and it will be rounded up to the nearest integer, 2.

Sample Input 2

7 4

Sample Output 2

6

The average of 7 and 4 is 5.5, and it will be rounded up to the nearest integer, 6.

Sample Input 3

5 5

Sample Output 3

5

Solution in Python (3.4.3) (judge verdict: Runtime Error)

import sys
s = input()
t = input()
s.sort()
t.sort()
for x, y in zip(s, t[::-1]):
    if x > y:
        print('No')
        sys.exit()
    elif x == y:
        continue
    else:
        print('Yes')
        sys.exit()
if len(s) <= len(t):
    print('Yes')
else:
    print('No')