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A string S represents a list of words. Each letter in the word has 1 or more options. If there is one option, the letter is represented as is. …
Given an array of integers nums, sort the array in ascending order. Example 1: Input: Output: Example 2: Input: Output: Note: 1 <= A.length <= 10000 -50000 <= A …
Numbers can be regarded as product of its factors. For example, 8 = 2 x 2 x 2; = 2 x 4. Write a function that takes an integer …
Given a set of candidate numbers (candidates) (without duplicates) and a target number (target), find all unique combinations in candidates where the candidate numbers sums to target. The same …
According to the definition of tree on Wikipedia: “a tree is an undirected graph in which any two vertices are connected by exactly one path. In other words, any …