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 Rust (1.15.1) (judge verdict: Accepted)

fn a_discount_fare() {
    let mut input = String::new();
    std::io::stdin().read_line(&mut input).unwrap();
    let read_values : Vec<i32> =
        input.trim_right()
        .split_whitespace()
        .map(|s| s.parse::<i32>().unwrap())
        .collect();
    let x = read_values[0];
    let y = read_values[1];

    println!("{}", x + y / 2);
}

fn main() {
    a_discount_fare();
}