import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        long l = scan.nextLong();
        long sum = 0;
        for (long i = 0; i < l; i++) {
            long in = scan.nextLong();
            sum += in;
        }
        System.out.println(sum);
        scan.close();
    }
}