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;
class Program
{
  static void Main()
  {
    int a = int.Parse(Console.ReadLine());
    int b = int.Parse(Console.ReadLine());
    
    int x = (a+b)/2;
    
    if((a+b)%2 == 0)
    {
      Console.Write(x+"\n");
    }
    else
    {
      Console.Write(x+1+"\n");
    }
  }
}