随笔分类 -  leetcode English

Construct Binary Tree from Inorder and Postorder Traversal
摘要：Given inorder and postorder traversal of a tree, construct the binary tree. Note:You may assume that duplicates do not exist in the tree. For example, 阅读全文
posted @ 2020-09-25 09:00 zmachine 阅读(172) 评论(0) 推荐(0)
Kth Largest Element in an Array
摘要：Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element. Example 阅读全文
posted @ 2020-09-15 15:34 zmachine 阅读(116) 评论(0) 推荐(0)
Network Delay Time
摘要：here are N network nodes, labelled 1 to N. Given times, a list of travel times as directed edges times[i] = (u, v, w), where u is the source node, v i 阅读全文
posted @ 2020-09-10 13:54 zmachine 阅读(176) 评论(0) 推荐(0)
Combination Sum II
摘要：Given a collection of candidate numbers (candidates) and a target number (target), find all unique combinations in candidates where the candidate numb 阅读全文
posted @ 2020-09-10 10:15 zmachine 阅读(99) 评论(0) 推荐(0)
N-Queens
摘要：The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens attack each other. Given an integer n, return all 阅读全文
posted @ 2020-09-04 19:48 zmachine 阅读(151) 评论(0) 推荐(0)
Predict the Winner
摘要：Given an array of scores that are non-negative integers. Player 1 picks one of the numbers from either end of the array followed by the player 2 and t 阅读全文
posted @ 2020-09-01 08:15 zmachine 阅读(156) 评论(0) 推荐(0)
Climbing Stairs
摘要：You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you cl 阅读全文
posted @ 2020-08-27 14:33 zmachine 阅读(96) 评论(0) 推荐(0)
Reconstruct Itinerary
摘要：Given a list of airline tickets represented by pairs of departure and arrival airports [from, to], reconstruct the itinerary in order. All of the tick 阅读全文
posted @ 2020-08-27 07:26 zmachine 阅读(125) 评论(0) 推荐(0)
Merge k Sorted Lists
摘要：Given an array of linked-lists lists, each linked list is sorted in ascending order. Merge all the linked-lists into one sort linked-list and return i 阅读全文
posted @ 2020-08-26 10:50 zmachine 阅读(105) 评论(0) 推荐(0)
3Sum
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 阅读全文
posted @ 2020-08-25 19:03 zmachine 阅读(184) 评论(0) 推荐(0)
Two Sum
摘要：Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have ex 阅读全文
posted @ 2020-08-25 17:29 zmachine 阅读(79) 评论(0) 推荐(0)
Increasing Subsequences
摘要：Given an integer array, your task is to find all the different possible increasing subsequences of the given array, and the length of an increasing su 阅读全文
posted @ 2020-08-25 16:18 zmachine 阅读(159) 评论(0) 推荐(0)
Bitwise AND of Numbers Range
摘要：Given a range [m, n] where 0 <= m <= n <= 2147483647, return the bitwise AND of all numbers in this range, inclusive. Example 1: Input: [5,7]Output: 4 阅读全文
posted @ 2020-08-23 09:21 zmachine 阅读(98) 评论(0) 推荐(0)
Median of Two Sorted Arrays
摘要：Given two sorted arrays nums1 and nums2 of size m and n respectively. Return the median of the two sorted arrays. Follow up: The overall run time comp 阅读全文
posted @ 2020-08-22 11:51 zmachine 阅读(141) 评论(0) 推荐(0)
24 Game
摘要：You have 4 cards each containing a number from 1 to 9. You need to judge whether they could operated through *, /, +, -, (, ) to get the value of 24. 阅读全文
posted @ 2020-08-22 10:43 zmachine 阅读(154) 评论(0) 推荐(0)