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)

s = list(input())
t = list(input())
s.sort()
t.sort(reverse=True)
for i in range(100):
    if bool(s[i:i+1]) == False:
        if t[i:i+1]:
            print("Yes")
            break
        else:
            print("No")
            break
    elif bool(t[i:i+1]) == False:
        print("No")
        break
    elif (s[i] < t[i]):
        print("Yes")
        break
    elif (s[i] > t[i]):
        print("No")
        break