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 mut result: i64 = 0;
    for _i in 0..num {
        let num: i64 = read();
        result += num;
    }
    print!("{}", result);
}