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 Rust (1.15.1) (judge verdict: Accepted)

fn main() {
    let scan = std::io::stdin();
    
    let mut line = String::new();

    let _ = scan.read_line(&mut line);
    let vec: Vec<&str> = line.split_whitespace().collect();

    let a: i32 = vec[0].parse().unwrap();
    let b: i32 = vec[1].parse().unwrap();

    if (a+b)%2==0 {
        println!("{}", (a+b)/2);
    } else {
        println!("{}", (a+b)/2+1);
    };
}