// yukicoder My Practice
// author: Leonardone @ NEETSDKASU

use std::io;
use std::io::Read;

fn main() {
    
    let stdin = {
        let mut s = String::new();
        io::stdin().read_to_string(&mut s).expect("failed to read string");
        s.to_string()
    };
    
    let mut stdin = stdin.split_whitespace();
    
    macro_rules! get { () => ( stdin.next().unwrap().parse().unwrap() ) }
    
    let n: u32 = get!();
    
    let mut sum: u64 = 0;
    
    for _ in 0..n {
        sum += get!();
    }
    
    println!("{}", sum);
}