pub mod io {
    use std::io::{Read, ErrorKind};

    pub struct Scanner<R> { r: R, buf: Vec<u8>, pos: usize, cap: usize }
 
    impl<R: Read> Scanner<R> {
        const SIZE: usize = 8000;
    
        pub fn new(r: R) -> Self {
            Self { r, buf: Vec::new(), pos: 0, cap: 0 }
        }

        fn set_pos(&mut self, f: fn(&u8) -> bool) -> usize {
            let mut pos = self.pos;
            loop {
                if pos == self.cap {
                    if self.cap == self.buf.len() {
                        if self.pos > 0 {
                            self.buf.copy_within(self.pos..self.cap, 0);
                            self.cap -= self.pos;
                            pos -= self.pos;
                            self.pos = 0;
                        } else {
                            self.buf.resize(self.buf.len() + Self::SIZE, 0);
                        }
                    }
                    match unsafe {
                        self.r.read(self.buf.get_unchecked_mut(self.cap..))
                    } {
                        Ok(0) => return pos,
                        Ok(n) => self.cap += n,
                        Err(e) if e.kind() == ErrorKind::Interrupted => continue,
                        Err(e) => panic!("{}", e),
                    }
                }
                match unsafe {
                    self.buf.get_unchecked(pos..self.cap).iter().position(f)
                } {
                    Some(i) => return pos + i,
                    None => pos = self.cap,
                }    
            }
        }

        pub fn next(&mut self) -> &str {
            self.pos = self.set_pos(|b| !b.is_ascii_whitespace());
            let pos = self.set_pos(u8::is_ascii_whitespace);
            let buf = &self.buf[self.pos..pos];
            self.pos = pos;
            std::str::from_utf8(buf).unwrap()
        }
    }

    #[macro_export]
    macro_rules! scan {
        ($r:expr, [$t:tt; $n:expr]) => {
            (0..$n).map(|_| scan!($r, $t)).collect::<Vec<_>>()
        };
        ($r:expr, [$t:tt]) => {
            scan!($r, [$t; scan!($r, usize)])
        };
        ($r:expr, ($($t:tt),*)) => {
            ($(scan!($r, $t)),*)
        };
        ($r:expr, Usize1) => {
            scan!($r, usize) - 1
        };
        ($r:expr, Bytes) => {
            scan!($r, String).into_bytes()
        };
        ($r:expr, $t:ty) => {
            $r.next().parse::<$t>().unwrap()
        };
    }

    #[macro_export]
    macro_rules! input {
        ($($($v:ident)* : $t:tt),* $(,)?) => {
            let stdin = std::io::stdin();
            let ref mut scanner = io::Scanner::new(stdin.lock());
            $(let $($v)* = scan!(scanner, $t);)*
        };
    }
}

fn main() {
    input! {
        n: usize,
        a: [u64; n],
    }

    println!("{}", a.iter().sum::<u64>());
}