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摘要： A tree is an undirected graph in which any two vertices are connected by exactly one path. In other words, any connected graph without simple cycles i 阅读全文

摘要： Given a C++ program, remove comments from it. The program source is an array where source[i] is the i-th line of the source code. This represents the 阅读全文

摘要： 这三道题差别不是非常大所以可以放在一起练习。 243. Shortest Word Distance Given a list of words and two words word1 and word2, return the shortest distance between these two 阅读全文

摘要： Given a set of points in the xy-plane, determine the minimum area of a rectangle formed from these points, with sides parallel to the x and y axes. If 阅读全文

摘要： There are N children standing in a line. Each child is assigned a rating value. You are giving candies to these children subjected to the following re 阅读全文

摘要： There are n soldiers standing in a line. Each soldier is assigned a unique rating value. You have to form a team of 3 soldiers amongst them under the 阅读全文

摘要： Given an integer array nums, return the number of longest increasing subsequences. Example 1: Input: nums = [1,3,5,4,7] Output: 2 Explanation: The two 阅读全文

摘要： Given an array of integers nums, calculate the pivot index of this array. The pivot index is the index where the sum of all the numbers strictly to th 阅读全文

摘要： In a gold mine grid of size m * n, each cell in this mine has an integer representing the amount of gold in that cell, 0 if it is empty. Return the ma 阅读全文

摘要： You are given an array representing a row of seats where seats[i] = 1 represents a person sitting in the ith seat, and seats[i] = 0 represents that th 阅读全文

摘要： Given a list of strings words representing an English Dictionary, find the longest word in words that can be built one character at a time by other wo 阅读全文

摘要： Given a string and a string dictionary, find the longest string in the dictionary that can be formed by deleting some characters of the given string. 阅读全文

摘要： Given a string s, return the last substring of s in lexicographical order. Example 1: Input: "abab" Output: "bab" Explanation: The substrings are ["a" 阅读全文

摘要： A move consists of taking a point (x, y) and transforming it to either (x, x+y) or (x+y, y). Given a starting point (sx, sy) and a target point (tx, t 阅读全文

摘要： A school is trying to take an annual photo of all the students. The students are asked to stand in a single file line in non-decreasing order by heigh 阅读全文

摘要： We stack glasses in a pyramid, where the first row has 1 glass, the second row has 2 glasses, and so on until the 100th row. Each glass holds one cup  阅读全文

摘要： Alice and Bob take turns playing a game, with Alice starting first. Initially, there are n stones in a pile. On each player's turn, that player makes 阅读全文

摘要： You start with an initial power of power, an initial score of 0, and a bag of tokens given as an integer array tokens, where each tokens[i] donates th 阅读全文

摘要： Let's call any (contiguous) subarray B (of A) a mountain if the following properties hold: B.length >= 3 There exists some 0 < i < B.length - 1 such t 阅读全文

摘要： Given a sequence of n integers a1, a2, ..., an, a 132 pattern is a subsequence ai, aj, ak such that i < j < k and ai < ak < aj. Design an algorithm th 阅读全文