RosettaCodeData/Task/A+B/Rust/a+b-2.rust

#![feature(iter_arith)]
use std::io;

fn main() {
    let mut a = String::new();
    io::stdin().read_line(&mut a).expect("reading stdin");
    println!("{}",
             a.split_whitespace()
              .map(|x| x.parse::<i32>().expect("these better be numbers"))
              .sum::<i32>());
}