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 Ruby (2.3.3) (judge verdict: Accepted)

# frozen_string_literal: true

A, B = gets.chomp.split(" ").map { |i| i.to_i }
if (A + B) % 2 == 0 then
C = (A + B ) / 2 
puts C
elsif(A + B) % 2 != 0 then
    C = (A + B ) / 2 + 1
    puts C
end