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]; long sum = 0;
        for (int i = 0; i < n; i++) a[i] = sc.nextLong();
        for (int j = 0; j < n; j++) sum += a[j];
        System.out.println(sum);
    }
}