use std::io::stdin;

fn get_line() -> String {
    let mut line = String::new();
    stdin().read_line(&mut line).ok();
    line
}

fn main() {
    let line = get_line();
    let mut index: i32 = line.trim().parse().unwrap();
    let mut result = 0;
    while index != 0 {
        let line = get_line();
        let int: i64 = line.trim().parse().unwrap();
        result += int;
        index -= 1;
    }
    println!("{}", result);
}