Given an array A of length n(n≤105, ai<250), divide it into two subsequences X and Y such that (x1|x2...) ⊕ (y1|y2...) is maximum. Print the maximum OR(X) ⊕ OR(Y).
Any help would be appreciated. Thanks!
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i believe you need to know a technique called XOR basis to solve this. its the same as this problem https://atcoder.jp/contests/abc141/tasks/abc141_f