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: Runtime Error)

using System;
using System.Collections.Generic;
using System.Linq;


namespace ConsoleApp9
{
    class Program
    {
        static void Main(string[] args)
        {
            char[] s = Console.ReadLine().ToArray();
            char[] t = Console.ReadLine().ToArray();
            Array.Sort(s);
            Array.Sort(t);
            string ans = null;
            int Length;
            int Lengthkind;
            if (s.Length >= t.Length) { Length = t.Length; Lengthkind = 0; }
            else { Length = s.Length; Lengthkind = 1; }
            for (int i = 0; i < Length; i++)
            {
                if (s[i] > t[t.Length - i - 1]) { ans = "No"; break; }
                else if (s[i] < t[t.Length - i - 1]) { ans = "Yes";break; }
                if (i == Length - 1)
                {
                    if (Lengthkind == 0) ans = "No";
                    else ans = "Yes";
                    break;
                }
            }
            Console.WriteLine(ans);
        }
    }
}