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 JavaScript (node.js v5.12) (judge verdict: Runtime Error)

function Main(input) {
	input = input.split("\n");
	
	var s = input[0];
	var t = input[1];
	
	var alphabetSort = (function(a, b){
		a = a.toString().toLowerCase();
		b = b.toString().toLowerCase();
		if(a < b){
			return -1;
		}else if(a > b){
			return 1;
		}
		return 0;
	});
	
	var ss = s.split("").sort(alphabetSort).join();
	var rst = t.split(").sort(alphabetSort).reverse().join();
	
	var result = [ss, rst].sort(alphabetSort);
	//s'<t'ならばresult[0] = s'
	
    console.log(result[0] == ss ? "Yes" : "No");
}
//*この行以降は編集しないでください（標準入出力から一度に読み込み、Mainを呼び出します）
Main(require("fs").readFileSync("/dev/stdin", "utf8"));