import java.util.Scanner;
public class No9008 {
  public static void main(String[] args) {
    int n;
    Scanner sc = new Scanner(System.in);
    n = sc.nextInt();
    long sum = 0;
    for (int i = 0; i < n; i++) {
      sum += sc.nextInt();
    }
    System.out.println(sum);
  }
}