Statement

Doctor Strange found two integer arrays of length N, namely A_0, …, A_N-1 and B_0, …, B_N-1. He can perform the following operation on A any number of times: (1) Choose an index 1 ≤ i ≤ N - 2 and let A_i := -(A_i - 1 + A_i + A_i + 1). That is, assign the value -(A_i - 1 + A_i + A_i + 1) to A_i. Help the Doctor determine whether it is possible to make the array A equal to B and if so, then find the minimum number of operations required to achieve this.