unlucky

import java.util.Scanner;
 
public class unlucky{
	public static void main(String [] args)
	{
		Scanner input = new Scanner (System.in);

		int params = input.nextInt();
		int[] arr = new int[params];
		for(int i = 0 ; i < arr.length ; i++){
			arr[i] = input.nextInt();
 			}
 		int fin = sum(arr);




		System.out.println(fin);
	}

	public static int sum(int[] arr){
		int sum = 0;
		if(arr.length == 0){
		sum = 0;
		} 
		else{
				for(int i = 0 ; i < arr.length ; i++)
				{
					if( arr[i] == 13)
					{
						arr[i] = 0;
					} else {
						sum = sum + arr[i];
					}
				}
		
		

		}
		return sum;
 	}

}