You are given a list of integers that should originally represent all numbers from 1 to n. However, one number appears twice and another number is missing. Your task is to find the number that is duplicated and the one that is missing.
In English, certain words can be formed by adding a suffix to a root word. Given a list of root words and a sentence, replace every word in the sentence that is a derivative of any root word with the shortest root. If a word can be formed by more than one root, replace it with the shortest root.
Given the root of a binary tree, return all duplicate subtrees. For each duplicate subtree, return the root node of any one of them. Two trees are considered duplicates if they have the same structure and node values.
You are given a sorted integer array nums. Determine if it is possible to split nums into one or more subsequences such that each subsequence is a consecutive increasing sequence and each subsequence has a length of 3 or more.
