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)

use std::io::*;
use std::str::FromStr;

fn main() {
    let stdin = stdin();
    let mut stdinlock = stdin.lock();
    let mut str1 = String::new();
    stdinlock.read_line(&mut str1).unwrap();
    let mut iter = str1.trim().split_whitespace().map(|x| u32::from_str(x).unwrap());
    let a = iter.next().unwrap();
    let b = iter.next().unwrap();
    let c = (((a + b) as f32 / 2f32)).ceil();
    println!("{}", c as u32);
}