use std::io::{self, Read};

fn read_stdin() -> Vec<String> {
    let mut buffer = String::new();
    io::stdin().read_to_string(&mut buffer).ok();
    buffer.trim().split('\n').map(|s| s.to_string()).collect()
}

fn main() {
    let input = read_stdin();
    let result = input[1].split(' ').fold(0, |sum, i| sum + i.parse::<usize>().unwrap());
    println!("{}", result);
}