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 Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.*;
public class Main {
	public static void main(String[] args){
    //データ取り込み
		Scanner sc = new Scanner(System.in);
		//String S = sc.next();
    //int B = sc.nextInt();
    //System.out.println();
		int A = sc.nextInt();
		int B = sc.nextInt();

		if((A+B)%2==0){
			System.out.println((A+B)/2);
		}else{
			System.out.println((A+B)/2+1);
		}
	}
}