mod io {
    pub fn scan<R: std::io::BufRead>(r: &mut R) -> Vec<u8> {
        let mut res = Vec::new();
        loop {
            let buf = match r.fill_buf() {
                Ok(buf) => buf,
                Err(e) if e.kind() == std::io::ErrorKind::Interrupted => continue,
                Err(e) => panic!(e), 
            };
            let (done, used) = match buf.iter().position(u8::is_ascii_whitespace) {
                Some(i) => {
                    res.extend_from_slice(&buf[..i]);
                    (res.len() > 0, i + 1)
                }
                None => {
                    res.extend_from_slice(buf);
                    (buf.is_empty(), buf.len())
                }
            };
            r.consume(used);
            if done { return res; }
        }
    }
}

#[allow(unused_macros)]
fn run<R: std::io::BufRead, W: std::io::Write>(reader: &mut R, writer: &mut W) {
    macro_rules! scan {
        ($($($v:ident)*: $t:tt),*, $(,)?) => ($(let $($v)* = scan!($t);)*);
        ([$t:tt; $n:expr]) => ((0..$n).map(|_| scan!($t)).collect::<Vec<_>>());
        (($($t:tt),*)) => (($(scan!($t)),*));
        ([u8]) => (io::scan(reader));
        (String) => (scan!([u8]).into_iter().map(|b| b as char).collect::<String>());
        ($t:ty) => (scan!(String).parse::<$t>().unwrap());
    }
    macro_rules! print {
        ($($arg:tt)*) => (write!(writer, $($arg)*).ok());
    }
    macro_rules! println {
        ($($arg:tt)*) => (writeln!(writer, $($arg)*).ok());
    }

    let n = scan!(usize);
    let a = scan!([u64; n]);
    println!("{}", a.iter().sum::<u64>());
}

fn main() {
    let (stdin, stdout) = (std::io::stdin(), std::io::stdout());
    let mut reader = std::io::BufReader::new(stdin.lock());
    let mut writer = std::io::BufWriter::new(stdout.lock());
    run(&mut reader, &mut writer);
}