Hey, In Round #655 problem D I am having TLE , 86974560

My idea (mostly similar to the editorial's but have some changes) is in the below image, Let n = 5, a = [1, 2, 3, 4, 5] and I have 2 steps. One step 1 I start from the first element and move by 2, so from 1 --> 3 --> 5 --> 2 --> 4. I will create a array for this [1, 3, 5, 2, 4]. Then I will find the maximum sum of length (n + 1)/2 as maxx1.

On step 2 I will repeat the above from starting from the second element and move by 2, 2 --> 4 --> 1 --> 3 --> 5. [2, 4, 1, 3, 5]. Then find the maximum sum of length (n + 1)/2 as maxx2.

Return the max(maxx1, maxx2). That was all, I am sure it works (No Wrong Answer).

I guess the Time Complexity will be around O(n). Someone tell me if it is larger or know why the TLE occured?