Problem:
Score: 100 points

Problem Statement

There is a train going from Station A to Station B that costs X yen (the currency of Japan).

Also, there is a bus going from Station B to Station C that costs Y yen.

Joisino got a special ticket. With this ticket, she can take the bus for half the fare if she travels from Station A to Station B by train and then travels from Station B to Station C by bus.

How much does it cost to travel from Station A to Station C if she uses this ticket?

Constraints

1 \leq X,Y \leq 100

Y is an even number.

All values in input are integers.

Input

Input is given from Standard Input in the following format:

X Y

Output

If it costs x yen to travel from Station A to Station C, print x.

Sample Input 1

81 58

Sample Output 1

110

The train fare is 81 yen.

The train fare is 58 ⁄ 2=29 yen with the 50% discount.

Thus, it costs 110 yen to travel from Station A to Station C.

Sample Input 2

4 54

Sample Output 2

31

Solution in Java7 (OpenJDK 1.7.0) (judge verdict: Accepted)

import java.util.*;

 
class Main {
 
    private static Scanner sc = new Scanner(System.in);
 
    public static void main(String[] args) {
        String s = sc.next();
        String s2 = sc.next();

        //String s = String.valueOf(i);
        int i = Integer.parseInt(s);
        int i2 =Integer.parseInt(s2);
        //System.out.println((s + s).contains(s2) ? "Yes" : "No");
        System.out.println(i+i2/2);
    }
}