SumofArray

import java.util.Scanner;

public class Runner {

	static Scanner s = new Scanner(System.in);

	public static void main(String[] args) {
		int n = s.nextInt();
		int input[] = new int[n];
		for(int i = 0; i < n; i++) {
			input[i] = s.nextInt();
		}
		System.out.println(Solution.sum(input));
	}
}


public class Solution {

	public static int sum(int input[]) {
		/* Your class should be named Solution
		 * Don't write main().
		 * Don't read input, it is passed as function argument.
		 * Return output and don't print it.
	 	 * Taking input and printing output is handled automatically.
		*/
      	if(input.length==1){
          return input[0];
        }
		int smallerInput[]=new int[input.length-1];
      	for(int index=1;index<input.length;index++){
          smallerInput[index-1]=input[index];
        }
     	int total=sum(smallerInput);
      	total+=input[0];
      	return total;
	}
}