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 System.Collections.Generic;
using System.Linq;

namespace ConsoleApplication7
{
    class Program
    {
        static void Main()
        {
            string[] s_num = Console.ReadLine().Split(' ');
            int[] num = new int[s_num.Length];
            foreach (var x in Enumerable.Range(0, s_num.Length)) num[x] = int.Parse(s_num[x]);
            double ave = num.Average();
            
            double ceiling = Math.Ceiling(ave);
            Console.WriteLine(ceiling);
        }
    }
}