import java.util.Scanner;

public class Answer {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int dataCount = sc.nextInt();
    long sum = 0;

    for(int i = 0;i < dataCount;i++){
      sum += sc.nextLong();
    }
    
    sc.close();
    System.out.println(sum);

  }
}