Blackzxy - 博客园

LeetCode 354. Russian Doll Envelopes 排序+LIS

摘要： You are given a 2D array of integers `envelopes` where `envelopes[i] = [wi, hi]` represents the width and the height of an envelope. One envelope can 阅读全文

posted @ 2023-07-14 22:37 Blackzxy 阅读(6) 评论(0) 推荐(0) 编辑

LeetCode 519. Random Flip Matrix 哈希Map

摘要： There is an `m x n` binary grid matrix with all the values set 0 initially. Design an algorithm to randomly pick an index `(i, j)` where `matrix[i][j] 阅读全文

posted @ 2023-07-14 20:58 Blackzxy 阅读(4) 评论(0) 推荐(0) 编辑

LeetCode 496. Next Greater Element I 单调栈

摘要： The next greater element of some element x in an array is the first greater element that is to the right of x in the same array. You are given two dis 阅读全文

posted @ 2023-02-13 22:39 Blackzxy 阅读(10) 评论(0) 推荐(0) 编辑

LeetCode 283 Move Zeroes

摘要： Given an integer array nums, move all 0's to the end of it while maintaining the relative order of the non-zero elements. Note that you must do this i 阅读全文

posted @ 2022-11-03 16:23 Blackzxy 阅读(14) 评论(0) 推荐(0) 编辑

[Oracle] LeetCode 1472 Design Browser History 双stack

摘要： You have a browser of one tab where you start on the homepage and you can visit another url, get back in the history number of steps or move forward i 阅读全文

posted @ 2022-10-28 15:13 Blackzxy 阅读(17) 评论(0) 推荐(0) 编辑

[Oracle] LeetCode 314 Binary Tree Vertical Order Traversal

摘要： Given the root of a binary tree, return the vertical order traversal of its nodes' values. (i.e., from top to bottom, column by column). If two nodes 阅读全文

posted @ 2022-10-27 02:36 Blackzxy 阅读(5) 评论(0) 推荐(0) 编辑

[Oracle] LeetCode 694 Number of Distinct Islands 标记路线的DFS

摘要： You are given an m x n binary matrix grid. An island is a group of 1's (representing land) connected 4-directionally (horizontal or vertical.) You may 阅读全文

posted @ 2022-10-26 06:44 Blackzxy 阅读(13) 评论(0) 推荐(0) 编辑

[Oracle] LeetCode 848 Shifting Letters

摘要： You are given a string s of lowercase English letters and an integer array shifts of the same length. Call the shift() of a letter, the next letter in 阅读全文

posted @ 2022-10-26 05:33 Blackzxy 阅读(14) 评论(0) 推荐(0) 编辑

[Oracle] LeetCode 300 Longest Increasing Subsequence

摘要： Given an integer array nums, return the length of the longest strictly increasing subsequence. A subsequence is a sequence that can be derived from an 阅读全文

posted @ 2022-10-14 15:18 Blackzxy 阅读(12) 评论(0) 推荐(0) 编辑

[Oracle] LeetCode 20 Valid Parentheses

摘要： Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: 阅读全文

posted @ 2022-10-08 16:29 Blackzxy 阅读(9) 评论(0) 推荐(0) 编辑

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