Zero Array

You are given a $0$-indexed cyclic array $A$ containing $N$ non-negative integers. You can perform the following operation on this array : - Choose an index $k$, ($0\leq k\lt N$), and subtract $1$ from both $A_k$ and $A_{(k+1) \bmod N}$. That is, subtract $1$ from two adjacent elements of the cyclic array. Determine if you can convert **all** elements of the array to $0$ by performing the abov