每组数据有两个整数
use std::io::{self, *};
fn main() {
let stdin = io::stdin();
while let Some(Ok(line)) = stdin.lock().lines().next() {
let numbers: Vec<&str> = line.split(" ").collect();
let a = numbers[0].trim().parse::<i32>().unwrap_or(0);
let b = numbers[1].trim().parse::<i32>().unwrap_or(0);
print!("{}\n", a + b);
}
}