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 Perl (v5.18.2) (judge verdict: Accepted)

#!/usr/bin/perl
#abc082_a.pl
#Thu Jan 11 23:07:27 2018
#

use warnings;
use strict;

my $temp = <STDIN>;
chomp $temp;

my @temps = split(" ",$temp);

my $a = $temps[0];
my $b = $temps[1];

if (($a+$b)%2>0){
	print int(($a+$b)/2)+1,"\n";
}else{
	print int(($a+$b)/2),"\n";
}