fn getline() -> String {
    let mut a = String::new();
    std::io::stdin().read_line(&mut a).ok();
    return a;
}

fn main() {
    let b = getline();
    let num: i32 = b.trim().parse().unwrap();
    let mut res: i32 = 0;
    for i in 0..num {
        let c = getline();
        res += c.trim().parse::<i32>().unwrap();
    }
    println!("{}", res);
}