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 mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    let v : Vec<f32> = s.trim().split_whitespace().map(|e| e.parse().ok().unwrap()).collect();
    let ans = f32::ceil((v[0] + v[1]) / 2.0 );

    println!("{}", ans);
}