fn read() -> Vec<u64> {
    fn read_line() -> String {
        let mut buf = String::new();
        std::io::stdin().read_line(&mut buf).unwrap();
        buf.trim().to_owned()
    }
    let _ = read_line();
    read_line()
        .split_ascii_whitespace()
        .map(|e| e.parse().unwrap())
        .collect()
}

fn main() {
    let a = read();
    println!("{}", a.iter().sum::<u64>());
}