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Given two words (beginWord and endWord), and a dictionary's word list, find all shortest transformation sequence(s) from beginWord to endWord, such th 阅读全文
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Given a 2D board and a list of words from the dictionary, find all words in the board. Each word must be constructed from letters of sequentially adja 阅读全文
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Bholu the Pandit on this New Year wanted to divide his Cuboidal Packaging block into cubes. But he loves uniformity so he asks you to divide it such a 阅读全文
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Find all possible combinations of k numbers that add up to a number n, given that only numbers from 1 to 9 can be used and each combination should be 阅读全文
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Design a data structure that supports the following two operations: void addWord(word) bool search(word) search(word) can search a literal word or a r 阅读全文
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We have a list of points on the plane. Find the K closest points to the origin (0, 0). (Here, the distance between two points on a plane is the Euclid 阅读全文
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For some fixed N, an array A is beautiful if it is a permutation of the integers 1, 2, ..., N, such that: For every i < j, there is no k with i < k < 阅读全文
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We are given S, a length n string of characters from the set {'D', 'I'}. (These letters stand for "decreasing" and "increasing".) A valid permutation 阅读全文
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In the video game Fallout 4, the quest "Road to Freedom" requires players to reach a metal dial called the "Freedom Trail Ring", and use the dial to s 阅读全文
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Given n balloons, indexed from 0 to n-1. Each balloon is painted with a number on it represented by array nums. You are asked to burst all the balloon 阅读全文