fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

fn main() {
    let num: i64 = read();
    let result = (0..num).fold(0, |sum, _i| {
        let num: i64 = read();
        sum + num
    });
    print!("{}", result);
}