use std::io::Read;

fn main() {
    let mut input = String::new();
    std::io::stdin().read_line(&mut input).ok();
    let mut input = String::new();
    std::io::stdin().read_to_string(&mut input).ok();

    let answer: u64 = input
        .trim()
        .split_whitespace()
        .map(|s| s.parse::<u64>().unwrap())
        .sum();
    println!("{:}", answer);
}