随笔分类 - LeetCode
摘要：Given an array nums, there is a sliding window of size k which is moving from the very left of the array to the very right. You can only see the k num
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摘要：Implement a trie with insert, search, and startsWith methods. Notice You may assume that all inputs are consist of lowercase letters a-z. Implement a
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摘要：Given an array of integers A with even length, return true if and only if it is possible to reorder it such that A[2 * i + 1] = 2 * A[2 * i] for every
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摘要：Given a string, find the length of the longest substring T that contains at most k distinct characters. Example 1: Input: s = "eceba", k = 2 Output: 3
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摘要：Given an array nums of n integers where n > 1, return an array output such that output[i] is equal to the product of all the elements of nums except n
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摘要：Given an array of 2n integers, your task is to group these integers into n pairs of integer, say (a1, b1), (a2, b2), ..., (an, bn) which makes sum of
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摘要：Given a n-ary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest le
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摘要：A quadtree is a tree data in which each internal node has exactly four children: topLeft, topRight, bottomLeft and bottomRight. Quad trees are often u
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摘要：Given an array of integers nums, write a method that returns the "pivot" index of this array. We define the pivot index as the index where the sum of
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摘要：Given a set of distinct positive integers, find the largest subset such that every pair (Si, Sj) of elements in this subset satisfies: Si % Sj = 0 or
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摘要：Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rectangle in the hist
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摘要：Given an array of length n that stores a stock's price in n consecutive days, Buy/Sell stock with at most K transactions to maximize profit. You must
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摘要：Implement regular expression matching with support for '.' and '*'. '.' Matches any single character. '*' Matches zero or more of the preceding elemen
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摘要：Implement wildcard pattern matching with support for '?' and '*'. '?' Matches any single character. '*' Matches any sequence of characters (including
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摘要：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
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摘要：Given a sequence of words, and a limit on the number of characters that can be put in one line(line width). Put line breaks in the given sequence such
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摘要：Given a string S and a string T, count the number of distinct subsequences of T in S. A subsequence of a string is a new string which is formed from t
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摘要：Given a 2D binary matrix filled with 0's and 1's, find the largest square containing all 1's and return its area. For example, given the following mat
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摘要：Given certain jobs with start and end time and amount you make on finishing the job, find the maximum value you can make by scheduling jobs in non-ove
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摘要：Given a string s and a dictionary of words dict, determine if s can be break into a space-separated sequence of one or more dictionary words. Example
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