fn main() {
    //標準入力処理は https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8 より引用
    
    let mut sum: u64 = 0;
    
    let s = {
        let mut s = String::new();
        std::io::stdin().read_line(&mut s).unwrap();
        s.trim_end().to_owned()
    };

    let n: u64 = s.parse().unwrap();

    for _ in 0..n {
        let s = {
            let mut s = String::new();
            std::io::stdin().read_line(&mut s).unwrap();
            s.trim_end().to_owned()
        };

        let v: u64 = s.parse().unwrap();
        sum += v;
    }

    println!("{}", sum);


}