import java.util.*;
public class Main{
    public static void main(String args[]){
        Scanner scn=new Scanner (System.in);
        int n=scn.nextInt();
        if(n<=0 || n>1000){
            System.out.println("Invalid input");
        }
        int sum=0;
        int arr[]=new int[n];
        for(int i=0;i<n;i++){
            arr[i]=scn.nextInt();
            if(arr[i]%2 !=0){
                sum+=arr[i];
            }
        }
        System.out.println(su);
    }
}