I dont understand editorial

[premang (premang raithatha)]

can you please explain what we are doing in case 2.

what is the need ? how it works ?

(int detail)

[pratyush63 (Pratyush Kumar)]

Maximum Circular Subarray Sum (Editorial)

So if we subtract the negative value of this new sum from the cumulative sum of the original array we will get another candidate for the answer and name it candidate2. MY DOUBT IS WHY array-sum - (-max subarray sum of inverted array) WHY NOT array-sum - (max subarray sum of inverted array) Because its the minimum of original array.

Refer this.