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Given a string s and an integer k, return the length of the longest substring of s such that the frequency of each character in this substring is greater …
Given an integer list nums where each number represents the maximum number of hops you can make, return the minimum number of hops it would take to reach the …
Given a list/array/string in Python, find out if it is the subsequence of another. A subsequence X of Y is the sequence that removes non or more elements of …
Implement an algorithm to print all valid (e.g., properly opened and closed) combinations of n pairs of parentheses. Note: The result set should not contain duplicated subsets. For example, …
Write a method to return all subsets of a set. The elements in a set are pairwise distinct. Note: The result set should not contain duplicated subsets. Example: Input: nums …