Remove Adjacent

You are given an array $A$ of length $N$. You can perform the following operation on the array, as long as it has more than one element: - Choose any two **adjacent** elements, remove them from the array and insert their sum at that position. - Formally, if the current length of the array is $|A|$, you can choose an index $1 \leq i \lt |A|$, and transform the array into $[A_1, A_2, \ldots, A_{i-