随笔分类 - LeetCode
摘要：A complete binary tree is a binary tree in which every level, except possibly the last, is completely filled, and all nodes are as far left as possibl
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摘要：Given a circular array C of integers represented by , find the maximum possible sum of a non empty subarray of C. Here, a circular array means the end
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摘要：Given a string , return the "reversed" string where all characters that are not a letter stay in the same place, and all letters reverse their positio
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摘要：In a 2D grid of s and s, we change at most one to a . After, what is the size of the largest island? (An island is a 4 directionally connected group o
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摘要：We are given two arrays and of words. Each word is a string of lowercase letters. Now, say that word is a subset of word if every letter in occurs in
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摘要：Let's define a function that returns the number of unique characters on , for example if then , ,`"C" "O" "D" s`, therefore . On this problem given a
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摘要：Given an array , partition it into two (contiguous) subarrays and so that: Every element in is less than or equal to every element in . and are non em
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摘要：Given a positive integer , how many ways can we write it as a sum of consecutive positive integers? Example 1: Example 2: Example 3: Note: `1 这道题给了一个正
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摘要：In a deck of cards, each card has an integer written on it. Return if and only if you can choose such that it is possible to split the entire deck int
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摘要：An undirected, connected tree with N nodes labelled 0...N-1 and N-1 edges are given. The ith edge connects nodes edges[i][0] and edges[i][1] together.
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摘要：A game on an undirected graph is played by two players, Mouse and Cat, who alternate turns. The graph is given as follows: is a list of all nodes such
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摘要：Two strings X and Y are similar if we can swap two letters (in different positions) of X, so that it equals Y. For example, "tars" and "rats" are simi
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摘要：Given an array of integers , sort the array in ascending order. Example 1: Example 2: Note: 1. `1 这道题让我们给数组排序，在平时刷其他题的时候，遇到要排序的时候，一般都会调用系统自带的排序函数，像 C+
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摘要：This problem is an interactive problem new to the LeetCode platform. We are given a word list of unique words, each word is 6 letters long, and one wo
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摘要：In an election, the th vote was cast for at time . Now, we would like to implement the following query function: will return the number of the person
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摘要：An undirected, connected graph of N nodes (labeled 0, 1, 2, ..., N-1) is given as graph. graph.length = N, and j != i is in the list graph[i] exactly
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摘要：Given a rooted binary tree, return the lowest common ancestor of its deepest leaves. Recall that: The node of a binary tree is a leaf if and only if i
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摘要：We are given a list of (axis aligned) . Each , where (x1, y1) are the coordinates of the bottom left corner, and (x2, y2) are the coordinates of the t
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摘要：Given an array A of integers, for each integer A[i] we need to choose either x = -K or x = K, and add x to A[i] (only once). After this process, we ha
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摘要：Strings and are similar (for some non negative integer ) if we can swap the positions of two letters in exactly times so that the resulting string equ
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