use std::io;

fn read_line() -> String {
  let mut line = String::new();
  io::stdin().read_line(&mut line).unwrap();
  return line;
}


fn main() {
  read_line();
  let line = read_line();
  let mut sum  = 0;
  for s in line.split_ascii_whitespace() {
    sum += s.trim().parse::<u64>().unwrap();
  }
  print!("{}", sum);
}