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原题链接在这里：https://leetcode.com/problems/swapping-nodes-in-a-linked-list/ 题目： You are given the head of a linked list, and an integer k. Return the head
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posted @ 2022-06-16 03:18
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/maximum-twin-sum-of-a-linked-list/ 题目： In a linked list of size n, where n is even, the ith node (0-indexed) of
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posted @ 2022-06-15 14:32
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/k-radius-subarray-averages/ 题目： You are given a 0-indexed array nums of n integers, and an integer k. The k-radi
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posted @ 2022-06-15 11:59
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/minimum-operations-to-reduce-x-to-zero/ 题目： You are given an integer array nums and an integer x. In one operati
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posted @ 2022-06-14 15:05
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/find-a-peak-element-ii/ 题目： A peak element in a 2D grid is an element that is strictly greater than all of its a
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posted @ 2022-06-10 14:31
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/ip-to-cidr/ 题目： An IP address is a formatted 32-bit unsigned integer where each group of 8 bits is printed as a
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posted @ 2022-06-08 14:15
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/remove-vowels-from-a-string/ 题目： Given a string s, remove the vowels 'a', 'e', 'i', 'o', and 'u' from it, and re
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posted @ 2022-05-20 12:48
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/count-sub-islands/ 题目： You are given two m x n binary matrices grid1 and grid2 containing only 0's (representing
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posted @ 2022-05-16 06:56
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/minimum-insertions-to-balance-a-parentheses-string/ 题目： Given a parentheses string s containing only the charact
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posted @ 2022-05-01 06:30
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/minimum-number-of-swaps-to-make-the-string-balanced/ 题目： You are given a 0-indexed string s of even length n. Th
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posted @ 2022-05-01 05:52
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/delete-the-middle-node-of-a-linked-list/ 题目： You are given the head of a linked list. Delete the middle node, an
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posted @ 2022-04-26 11:13
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree-iv/ 题目： Given the root of a binary tree and an array of TreeNode objects
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posted @ 2022-04-24 11:24
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree-iii/ 题目： Given two nodes of a binary tree p and q, return their lowest c
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posted @ 2022-04-24 10:22
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree-ii/ 题目： Given the root of a binary tree, return the lowest common ancest
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posted @ 2022-04-24 07:08
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/iterator-for-combination/ 题目： Design the CombinationIterator class: CombinationIterator(string characters, int c
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posted @ 2021-03-07 13:25
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/prefix-and-suffix-search/ 题目： Design a special dictionary which has some words and allows you to search the word
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posted @ 2021-03-05 15:06
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JavaScipt Stack declear: []. pop an empty stack in JavaScipt return undefined
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posted @ 2020-05-05 11:12
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/rotate-string/ 题目： We are given two strings, A and B. A shift on A consists of taking string A and moving the le
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posted @ 2020-03-21 14:10
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/flower-planting-with-no-adjacent/ 题目： You have N gardens, labelled 1 to N. In each garden, you want to plant one
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posted @ 2020-03-21 13:49
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/implement-rand10-using-rand7/ 题目： Given a function rand7 which generates a uniform random integer in the range 1
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posted @ 2020-03-21 07:24
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/count-different-palindromic-subsequences/ 题目： Given a string S, find the number of different non-empty palindrom
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posted @ 2020-03-20 14:23
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/validate-stack-sequences/ 题目： Given two sequences pushed and popped with distinct values, return true if and onl
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posted @ 2020-03-09 10:21
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/product-of-the-last-k-numbers/ 题目： Implement the class ProductOfNumbers that supports two methods: 1. add(int nu
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posted @ 2020-03-08 15:19
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/flip-string-to-monotone-increasing/ 题目： A string of '0's and '1's is monotone increasing if it consists of some
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posted @ 2020-03-08 14:17
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/shortest-path-in-a-grid-with-obstacles-elimination/ 题目： Given a m * n grid, where each cell is either 0 (empty)
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posted @ 2020-03-08 08:16
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/number-of-ways-to-stay-in-the-same-place-after-some-steps/ 题目： You have a pointer at index 0 in an array of size
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posted @ 2020-03-02 14:04
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原题链接在这里：https://leetcode.com/problems/similar-string-groups/ 题目： Two strings X and Y are similar if we can swap two letters (in different positions) o
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posted @ 2020-03-02 12:43
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原题链接在这里：https://leetcode.com/problems/confusing-number-ii/ 题目： We can rotate digits by 180 degrees to form new digits. When 0, 1, 6, 8, 9 are rotated
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posted @ 2020-02-29 13:14
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原题链接在这里：https://leetcode.com/problems/confusing-number/ 题目： Given a number N, return true if and only if it is a confusing number, which satisfies the
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posted @ 2020-02-29 12:29
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原题链接在这里：https://leetcode.com/problems/string-transforms-into-another-string/ 题目： Given two strings str1 and str2 of the same length, determine whether
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posted @ 2020-02-29 12:10
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原题链接在这里：https://leetcode.com/problems/parallel-courses/ 题目： There are N courses, labelled from 1 to N. We are given relations[i] = [X, Y], representin
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posted @ 2020-02-27 13:58
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原题链接在这里：https://leetcode.com/problems/tree-diameter/ 题目： Given an undirected tree, return its diameter: the number of edges in a longest path in that
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posted @ 2020-02-26 08:09
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原题链接在这里：https://leetcode.com/problems/analyze-user-website-visit-pattern/ 题目： We are given some website visits: the user with name username[i] visited
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posted @ 2020-02-24 12:08
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/dice-roll-simulation/ 题目： A die simulator generates a random number from 1 to 6 for each roll. You introduced a
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posted @ 2020-02-18 14:04
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/sort-an-array/ 题目： Given an array of integers nums, sort the array in ascending order. Example 1: Input: nums =
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posted @ 2020-02-18 11:38
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/cousins-in-binary-tree/ 题目： In a binary tree, the root node is at depth 0, and children of each depth k node are
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posted @ 2020-02-18 11:15
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string/ 题目： Given a string S of lowercase letters, a duplicate removal consist
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posted @ 2020-02-18 10:33
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/elimination-game/ 题目： There is a list of sorted integers from 1 to n. Starting from left to right, remove the fi
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posted @ 2020-02-18 06:56
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string-ii/ 题目： Given a string s, a k duplicate removal consists of choosing k
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posted @ 2020-02-18 06:37
Dylan_Java_NYC
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原题链接在这里：https://leetcode.com/problems/all-paths-from-source-to-target/ 题目： Given a directed, acyclic graph of N nodes. Find all possible paths from no
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posted @ 2020-02-18 05:55
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