use std::fmt::Debug;
use std::io::stdin;
use std::str::FromStr;

fn read_line<T>() -> Vec<T>
    where T: FromStr, <T as FromStr>::Err: Debug {
    let mut s = String::new();
    stdin().read_line(&mut s).unwrap();
    s.trim().split_whitespace().map(|c| T::from_str(c).unwrap()).collect()
}


fn main() {
    let n: usize = read_line()[0];
    let a: Vec<usize> = read_line();
    let sum: usize = a.iter().sum();
    println!("{}", sum);
}