You are given an array of integers as an argument. Return the largest sum that can be obtained by adding together two non-adjacent elements.

Requirements

• Must return a single integer
• Must handle both positive and negative integers

Example #1

solve([999, 888, 0, 10, 50])
> 1045

999 and 50 are the two largest non-adjacent integers. We return their sum which is 1045.

Example #2

solve([10, -20, 0, 50, 20])
> 60

10 and 50 are the two largest non-adjacent integers. We return their sum which is 60.