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Requirement was confused at a[i] != a[i+1]
Vu Dao
Jan 12, 2024
Monotonically increasing or decreasing means that for any index i in the array arr[i] != arr[i+1]. I saw this test case, is it valid? arr[4] == arr[5]
[1, 2, 3, 4, 5, 5, 4, 3, 2, 1]
Anw, I'll update my answer.
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