import java.util.Scanner;
public class No9009 {
  public static void main(String[] args) {
    int n;
    Scanner sc = new Scanner(System.in);
    n = sc.nextInt();
    long[] l = new long[n];
    long sum = 0;
    for (int i = 0; i < n; i++) {
      l[i] = sc.nextLong();
    }
    for (int i = 0; i < n; i++) {
      sum += l[i];
    }
    System.out.println(sum);
  }
}