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 C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using static System.Console;
public class Hello{
    public static void Main(){
        string[] a = ReadLine().Split(' ');
        int x = int.Parse(a[0]);
        int y = int.Parse(a[1]);
//        int z = int.Parse(a[2]);
        if((x+y)%2==1){
            WriteLine((x+y)/2+1);
        }else{
            WriteLine((x+y)/2);
        }
    }
}