neverlandly - 博客园

摘要： Note: The size of the BST will not exceed 50. The BST is always valid and each node's value is different. Note: The size of the BST will not exceed 50 阅读全文

posted @ 2019-10-18 15:04 neverlandly 阅读(213) 评论(0) 推荐(0)

Leetcode: Flip Equivalent Binary Trees

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posted @ 2019-10-18 13:25 neverlandly 阅读(2) 评论(0) 推荐(0)

Leetcode: Find And Replace in String

摘要： HashMap Sort and replace S from right to left (未深究) 阅读全文

posted @ 2019-10-18 12:57 neverlandly 阅读(133) 评论(0) 推荐(0)

Leetcode: Crack The Safe

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posted @ 2019-10-18 10:21 neverlandly 阅读(4) 评论(0) 推荐(0)

2019年10月17日

Leetcode: Confusing Number

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posted @ 2019-10-17 15:28 neverlandly 阅读(17) 评论(0) 推荐(0)

Leetcode: Optimize Water Distribution in a Village && Summary: Union Find and Minimum Spanning Tree

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posted @ 2019-10-17 14:24 neverlandly 阅读(5) 评论(0) 推荐(0)

Leetcode: Rotated Digits

摘要： X is a good number if after rotating each digit individually by 180 degrees, we get a valid number that is different from X. Each digit must be rotated - we cannot choose to leave it alone. A number i 阅读全文

posted @ 2019-10-17 12:21 neverlandly 阅读(133) 评论(0) 推荐(0)

2019年10月16日

Leetcode: Find Eventual Safe States

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posted @ 2019-10-16 15:38 neverlandly 阅读(2) 评论(0) 推荐(0)

Leetcode: Minimum Area Rectangle II

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posted @ 2019-10-16 13:22 neverlandly 阅读(4) 评论(0) 推荐(0)

Leetcode: Binary Tree Coloring Game

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posted @ 2019-10-16 09:51 neverlandly 阅读(3) 评论(0) 推荐(0)

2019年10月15日

Leetcode: Repeated String Match

摘要： The idea is to keep string builder and appending until the length A is greater or equal to B. use a while loop to keep adding A to stringBuilder until 阅读全文

posted @ 2019-10-15 15:28 neverlandly 阅读(73) 评论(0) 推荐(0)

Leetcode: Delete Nodes And Return Forest

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posted @ 2019-10-15 13:50 neverlandly 阅读(3) 评论(0) 推荐(0)

Leetcode: Construct Binary Tree from Preorder and Postorder Traversal

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posted @ 2019-10-15 10:14 neverlandly 阅读(2) 评论(0) 推荐(0)

2019年10月14日

Leetcode: Longest Word in Dictionary through Deleting

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posted @ 2019-10-14 15:08 neverlandly 阅读(3) 评论(0) 推荐(0)

Leetcode: Student Attendance Record II

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posted @ 2019-10-14 13:21 neverlandly 阅读(2) 评论(0) 推荐(0)

Leetcode: Student Attendance Record I

摘要： 1-liner s.contains("") normally is O(nm), but can be optimized to be O(n) O(n) scan 阅读全文

posted @ 2019-10-14 11:43 neverlandly 阅读(132) 评论(0) 推荐(0)

Microsoft OA

摘要：没有想到要再存一个HashMap, appearance to character mapping 阅读全文

posted @ 2019-10-14 08:34 neverlandly 阅读(516) 评论(0) 推荐(0)

2019年10月13日

Leetcode: Split Array into Consecutive Subsequences

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posted @ 2019-10-13 09:26 neverlandly 阅读(4) 评论(0) 推荐(0)

Leetcode: Robot Room Cleaner

摘要： Given a robot cleaner in a room modeled as a grid. Each cell in the grid can be empty or blocked. The robot cleaner with 4 given APIs can move forward, turn left or turn right. Each turn it made is... 阅读全文

posted @ 2019-10-13 07:43 neverlandly 阅读(267) 评论(0) 推荐(0)

Leetcode: Time Based Key-Value Store

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posted @ 2019-10-13 05:53 neverlandly 阅读(3) 评论(0) 推荐(0)

2019年10月12日

Leetcode: Most Stones Removed with Same Row or Column

摘要： If stone a and stone b are in the same column/row, we connect them as a component The largest possible number of moves we can make = the number of uni 阅读全文

posted @ 2019-10-12 15:03 neverlandly 阅读(194) 评论(0) 推荐(0)

Leetcode: Minimum Area Rectangle

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posted @ 2019-10-12 13:33 neverlandly 阅读(2) 评论(0) 推荐(0)

2019年10月11日

Leetcode: Find the Shortest Superstring

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posted @ 2019-10-11 14:01 neverlandly 阅读(5) 评论(0) 推荐(0)

2019年10月10日

Leetcode: Network Delay Time

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posted @ 2019-10-10 16:04 neverlandly 阅读(7) 评论(0) 推荐(0)

Leetcode: 24 Game

摘要： Backtracking: every time draw two cards, calculate the possible results, and add one result to the nextRound list. The nextRound list will have the re 阅读全文

posted @ 2019-10-10 14:10 neverlandly 阅读(194) 评论(0) 推荐(0)

Leetcode: Minimum Window Subsequence

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posted @ 2019-10-10 10:33 neverlandly 阅读(2) 评论(0) 推荐(0)

2019年10月9日

Leetcode: Brace Expansion

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posted @ 2019-10-09 15:52 neverlandly 阅读(3) 评论(0) 推荐(0)

Leetcode: Expressive Words

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posted @ 2019-10-09 15:05 neverlandly 阅读(2) 评论(0) 推荐(0)

Leetcode: Race Car