fn main() {
    let mut len_s = String::new();
    std::io::stdin().read_line(&mut len_s).ok();
    let mut nums_s = String::new();
    std::io::stdin().read_line(&mut nums_s).ok();

    let len: u32 = len_s.trim().parse().unwrap();
    let num: Vec<&str> = nums_s.trim().split(' ').collect();

    let mut sum: u64 = 0;

    for n in 0..len {
        let x: u64 = num[n as usize].parse().unwrap();
        sum += x;
    }
    println!("{}", sum);
}