import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        long[] a = new long[N];
        for (int i = 0; i < N; i++) {
            a[i] = sc.nextLong();
        }
        long ans = 0;
        for (int i = 0; i < N; i++) {
            ans += a[i];
        }
        System.out.println(ans);
    }
}