use std::io;

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

fn read_int() -> u64 {
  return read_line().trim().parse::<u64>().unwrap();
}

fn main() {
  let _loop = read_int();
  let mut sum = 0;
  for _ in 0.._loop {
    sum += read_int();
  }
  print!("{}", sum);
}