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Comparing Time Complexity


Subarray / Substring / Subsequence


Permutation Groups / Permutation Notations / Order of A Permutation / Transpositions


LeetCode: Stock Problems


Python: enumerate()


Python: Be cautious when using generators/iterators in nested loops


Python: It's safe to slice a list with index out of range


Python: calling static methods within the same class / recursive static methods


Python: sorted() vs list.sort()


LeetCode: Min Sub and Max Sub Problems