Question
Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, add spaces in s to construct a sentence where each word is a valid dictionary word. Return all such possible sentences.
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Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, determine if s can be segmented into a space-separated sequence of one or more dictionary words.
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Question
A linked list is given such that each node contains an additional random pointer which could point to any node in the list or null.
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Question
Given an array of numbers nums, in which exactly two elements appear only once and all the other elements appear exactly twice. Find the two elements that appear only once.
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Question
Given a non-empty array of integers, every element appears three times except for one, which appears exactly once. Find that single one.
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