随笔分类 - LeetCode
摘要：Move Zeroes (E) 题目 Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero element
阅读全文
摘要：Reverse Nodes in k-Group (H) 题目 Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. k is a positive inte
阅读全文
摘要：Swap Nodes in Pairs (M) 题目 Given a linked list, swap every two adjacent nodes and return its head. You may not modify the values in the list's nodes,
阅读全文
摘要：Merge k Sorted Lists (H) 题目 Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. Example: Input: [ 1->4-
阅读全文
摘要：Generate Parentheses (M) 题目 Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. For example, given
阅读全文
摘要：Perfect Squares (M) 题目 Given a positive integer n, find the least number of perfect square numbers (for example, 1, 4, 9, 16, ...) which sum to n. Exa
阅读全文
摘要：Merge Two Sorted Lists (E) 题目 Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of
阅读全文
摘要：Valid Parentheses (E) 题目 Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An inp
阅读全文
摘要：Remove Nth Node From End of List (M) 题目 Given a linked list, remove the n-th node from the end of list and return its head. Example: Given linked list
阅读全文
摘要：4Sum (M) 题目 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 a
阅读全文
摘要：First Bad Version (E) 题目 You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your pr
阅读全文
摘要：Integer to English Words (H) 题目 Convert a non-negative integer to its english words representation. Given input is guaranteed to be less than 231 - 1.
阅读全文
摘要：Letter Combinations of a Phone Number (M) 题目 Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the num
阅读全文
摘要：3Sum Closest (M) 题目 Given an array nums of n integers and an integer target, find three integers in nums such that the sum is closest to target. Retur
阅读全文
摘要：3Sum (M) 题目 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
阅读全文
摘要：Different Ways to Add Parentheses (M) 题目 Given a string of numbers and operators, return all possible results from computing all the different possibl
阅读全文
摘要：Longest Common Prefix (E) 题目 Write a function to find the longest common prefix string amongst an array of strings. If there is no common prefix, retu
阅读全文
摘要：Roman to Integer (E) 题目 Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. Symbol Value I 1 V 5 X 10 L 50 C 100 D 500
阅读全文
摘要：Container With Most Water (M) 题目 Given n non-negative integers \(a_1, a_2, ..., a_n\) , where each represents a point at coordinate \((i, a_i)\). n ve
阅读全文
摘要：Regular Expression Matching (H) Given an input string (s) and a pattern (p), implement regular expression matching with support for '.' and '*'. '.' M
阅读全文
浙公网安备 33010602011771号