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Interview Question
Given a 1-d array candy crush, return the shortest array after removing all the continuous same numbers (the repeating number >= 3) input: 1-d array [1, 3, 3, 3, 2, 2, 2, 3, 1]
return: [1, 1] (Explanation:- 133322231->133331->11)
Time complexity should be better than O(n^2)
