随笔分类 - leetcode
https://leetcode.com/problemset/all/
摘要：A string S of lowercase letters is given. We want to partition this string into as many parts as possible so that each letter appears in at most one p
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摘要：You are given two arrays (without duplicates) nums1 and nums2 where nums1’s elements are subset of nums2. Find all the next greater numbers for nums1'
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摘要：A matrix is Toeplitz if every diagonal from top left to bottom right has the same element. Now given an M x N matrix, return True if and only if the m
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摘要：Given an input string (s) and a pattern (p), implement wildcard pattern matching with support for '?' and ' '. '?' Matches any single character. ' ' M
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摘要：Write a program to solve a Sudoku puzzle by filling the empty cells. A sudoku solution must satisfy all of the following rules: 1. Each of the digits
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摘要：You are given a string, s, and a list of words, words, that are all of the same length. Find all starting indices of substring(s) in s that is a conca
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摘要：Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. k is a positive integer and is less than or equal to
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摘要：Given an array of non negative integers, you are initially positioned at the first index of the array. Each element in the array represents your maxim
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摘要：Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists. Example:
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摘要：Given a linked list, remove the n th node from the end of list and return its head. Example: Given linked list: 1 2 3 4 5, and n = 2. After removing t
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摘要：Given an array nums of n integers and an integer target, are there elements a, b, c, and d in nums such that a + b + c + d = target? Find all unique q
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摘要：Given an array nums of n integers and an integer target, find three integers in nums such that the sum is closest to target. Return the sum of the thr
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摘要：Given an array nums of n integers, are there elements a, b, c in nums such that a + b + c = 0? Find all unique triplets in the array which gives the s
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摘要：Given a set of candidate numbers (candidates) (without duplicates) and a target number (target), find all unique combinations in candidates where the
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摘要：You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Note: You have to rotate the image in place, which
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摘要：Given a collection of numbers that might contain duplicates, return all possible unique permutations. Example: Input: [1,1,2] Output: [ [1,1,2], [1,2,
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摘要：Given a linked list, swap every two adjacent nodes and return its head. Example: Given 1 2 3 4, you should return the list as 2 1 4 3. Note: Your algo
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摘要：Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. Example: Input: [ 1 4 5, 1 3 4, 2 6 ] Output: 1 1 2
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摘要：You are given a license key represented as a string S which consists only alphanumeric character and dashes. The string is separated into N+1 groups b
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摘要：We are playing the Guess Game. The game is as follows: I pick a number from 1 to n. You have to guess which number I picked. Every time you guess wron
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