import java.util.Scanner;
class test{
  public static void main(String args[]){
    Scanner scan = new Scanner(System.in);
    int a = scan.nextInt();
    long b[] = new long[a];
    long sum = 0;

    for(int i = 0; i < a; i++){
      b[i] = scan.nextLong();
      sum += b[i];
    }
  System.out.println(sum);
  }
}