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Title: GitHub - skytimeline/leetcode: LeetCode Solutions: A Record of My Problem Solving Journey.( leetcode题解，记录自己的leetcode解题之路。) · GitHub

Open Graph Title: GitHub - skytimeline/leetcode: LeetCode Solutions: A Record of My Problem Solving Journey.( leetcode题解，记录自己的leetcode解题之路。)

X Title: GitHub - skytimeline/leetcode: LeetCode Solutions: A Record of My Problem Solving Journey.( leetcode题解，记录自己的leetcode解题之路。)

Description: LeetCode Solutions: A Record of My Problem Solving Journey.( leetcode题解，记录自己的leetcode解题之路。) - skytimeline/leetcode

Open Graph Description: LeetCode Solutions: A Record of My Problem Solving Journey.( leetcode题解，记录自己的leetcode解题之路。) - skytimeline/leetcode

X Description: LeetCode Solutions: A Record of My Problem Solving Journey.( leetcode题解，记录自己的leetcode解题之路。) - skytimeline/leetcode

Mail addresses
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Opengraph URL: https://github.com/skytimeline/leetcode

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纪念项目 Star 突破 1W 的一个短文https://github.com/skytimeline/leetcode/blob/master/thanksGiving.md
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https://github.com/skytimeline/leetcode#食用指南
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https://github.com/skytimeline/leetcode/blob/master/assets/leetcode-zhihu.jpg
https://github.com/skytimeline/leetcode#精彩预告
0042.trapping-rain-waterhttps://github.com/skytimeline/leetcode/blob/master/problems/42.trapping-rain-water.md
https://github.com/skytimeline/leetcode/blob/master/assets/problems/42.trapping-rain-water-1.png
0547.friend-circleshttps://github.com/skytimeline/leetcode/blob/master/problems/547.friend-circles-en.md
https://github.com/skytimeline/leetcode/blob/master/assets/problems/547.friend-circle-bfs.png
backtrack problemshttps://github.com/skytimeline/leetcode/blob/master/problems/90.subsets-ii.md
https://github.com/skytimeline/leetcode/blob/master/assets/problems/backtrack.png
0198.house-robberhttps://github.com/skytimeline/leetcode/blob/master/problems/198.house-robber.md
https://github.com/skytimeline/leetcode/blob/master/assets/problems/198.house-robber.png
0454.4-sum-iihttps://github.com/skytimeline/leetcode/blob/master/problems/454.4-sum-ii.md
https://github.com/skytimeline/leetcode/blob/master/assets/problems/454.4-sum-ii.png
https://github.com/skytimeline/leetcode#top题目进度
Top 100 Liked Questionshttps://leetcode.com/problemset/top-100-liked-questions/
Top Interview Questionshttps://leetcode.com/problemset/top-interview-questions/
https://github.com/skytimeline/leetcode#传送门
https://github.com/skytimeline/leetcode#leetcode-经典题目的解析
https://github.com/skytimeline/leetcode#简单难度
0020.Valid Parentheseshttps://github.com/skytimeline/leetcode/blob/master/problems/20.validParentheses.md
0026.remove-duplicates-from-sorted-arrayhttps://github.com/skytimeline/leetcode/blob/master/problems/26.remove-duplicates-from-sorted-array.md
0053.maximum-sum-subarrayhttps://github.com/skytimeline/leetcode/blob/master/problems/53.maximum-sum-subarray-cn.md
0088.merge-sorted-arrayhttps://github.com/skytimeline/leetcode/blob/master/problems/88.merge-sorted-array.md
0104.maximum-depth-of-binary-treehttps://github.com/skytimeline/leetcode/blob/master/problems/104.maximum-depth-of-binary-tree.md
0121.best-time-to-buy-and-sell-stockhttps://github.com/skytimeline/leetcode/blob/master/problems/121.best-time-to-buy-and-sell-stock.md
0122.best-time-to-buy-and-sell-stock-iihttps://github.com/skytimeline/leetcode/blob/master/problems/122.best-time-to-buy-and-sell-stock-ii.md
0125.valid-palindromehttps://github.com/skytimeline/leetcode/blob/master/problems/125.valid-palindrome.md
0136.single-numberhttps://github.com/skytimeline/leetcode/blob/master/problems/136.single-number.md
0155.min-stackhttps://github.com/skytimeline/leetcode/blob/master/problems/155.min-stack.md
0167.two-sum-ii-input-array-is-sortedhttps://github.com/skytimeline/leetcode/blob/master/problems/167.two-sum-ii-input-array-is-sorted.md
0172.factorial-trailing-zeroeshttps://github.com/skytimeline/leetcode/blob/master/problems/172.factorial-trailing-zeroes.md
0169.majority-elementhttps://github.com/skytimeline/leetcode/blob/master/problems/169.majority-element.md
0190.reverse-bitshttps://github.com/skytimeline/leetcode/blob/master/problems/190.reverse-bits.md
0191.number-of-1-bitshttps://github.com/skytimeline/leetcode/blob/master/problems/191.number-of-1-bits.md
0198.house-robberhttps://github.com/skytimeline/leetcode/blob/master/problems/198.house-robber.md
0203.remove-linked-list-elementshttps://github.com/skytimeline/leetcode/blob/master/problems/203.remove-linked-list-elements.md
0206.reverse-linked-listhttps://github.com/skytimeline/leetcode/blob/master/problems/206.reverse-linked-list.md
0219.contains-duplicate-iihttps://github.com/skytimeline/leetcode/blob/master/problems/219.contains-duplicate-ii.md
0226.invert-binary-treehttps://github.com/skytimeline/leetcode/blob/master/problems/226.invert-binary-tree.md
0232.implement-queue-using-stackshttps://github.com/skytimeline/leetcode/blob/master/problems/232.implement-queue-using-stacks.md
0263.ugly-numberhttps://github.com/skytimeline/leetcode/blob/master/problems/263.ugly-number.md
0283.move-zeroeshttps://github.com/skytimeline/leetcode/blob/master/problems/283.move-zeroes.md
0342.power-of-fourhttps://github.com/skytimeline/leetcode/blob/master/problems/342.power-of-four.md
0349.intersection-of-two-arrayshttps://github.com/skytimeline/leetcode/blob/master/problems/349.intersection-of-two-arrays.md
0437.path-sum-iiihttps://github.com/skytimeline/leetcode/blob/master/problems/437.path-sum-iii.md
0371.sum-of-two-integershttps://github.com/skytimeline/leetcode/blob/master/problems/371.sum-of-two-integers.md
0575.distribute-candieshttps://github.com/skytimeline/leetcode/blob/master/problems/575.distribute-candies.md
https://github.com/skytimeline/leetcode#中等难度
0002. Add Two Numbershttps://github.com/skytimeline/leetcode/blob/master/problems/2.addTwoNumbers.md
0003. Longest Substring Without Repeating Charactershttps://github.com/skytimeline/leetcode/blob/master/problems/3.longestSubstringWithoutRepeatingCharacters.md
0005.longest-palindromic-substringhttps://github.com/skytimeline/leetcode/blob/master/problems/5.longest-palindromic-substring.md
0011.container-with-most-waterhttps://github.com/skytimeline/leetcode/blob/master/problems/11.container-with-most-water.md
0015.3-sumhttps://github.com/skytimeline/leetcode/blob/master/problems/15.3-sum.md
0019. Remove Nth Node From End of Listhttps://github.com/skytimeline/leetcode/blob/master/problems/19.removeNthNodeFromEndofList.md
0024. Swap Nodes In Pairshttps://github.com/skytimeline/leetcode/blob/master/problems/24.swapNodesInPairs.md
0029.divide-two-integershttps://github.com/skytimeline/leetcode/blob/master/problems/29.divide-two-integers.md
0031.next-permutationhttps://github.com/skytimeline/leetcode/blob/master/problems/31.next-permutation.md
0033.search-in-rotated-sorted-arrayhttps://github.com/skytimeline/leetcode/blob/master/problems/33.search-in-rotated-sorted-array.md
0039.combination-sumhttps://github.com/skytimeline/leetcode/blob/master/problems/39.combination-sum.md
0040.combination-sum-iihttps://github.com/skytimeline/leetcode/blob/master/problems/40.combination-sum-ii.md
0046.permutationshttps://github.com/skytimeline/leetcode/blob/master/problems/46.permutations.md
0047.permutations-iihttps://github.com/skytimeline/leetcode/blob/master/problems/47.permutations-ii.md
0048.rotate-imagehttps://github.com/skytimeline/leetcode/blob/master/problems/48.rotate-image.md
0049.group-anagramshttps://github.com/skytimeline/leetcode/blob/master/problems/49.group-anagrams.md
0055.jump-gamehttps://github.com/skytimeline/leetcode/blob/master/problems/55.jump-game.md
0056.merge-intervalshttps://github.com/skytimeline/leetcode/blob/master/problems/56.merge-intervals.md
0062.unique-pathshttps://github.com/skytimeline/leetcode/blob/master/problems/62.unique-paths.md
0073.set-matrix-zeroeshttps://github.com/skytimeline/leetcode/blob/master/problems/73.set-matrix-zeroes.md
0075.sort-colorshttps://github.com/skytimeline/leetcode/blob/master/problems/75.sort-colors.md
0078.subsetshttps://github.com/skytimeline/leetcode/blob/master/problems/78.subsets.md
0079.word-searchhttps://github.com/skytimeline/leetcode/blob/master/problems/79.word-search.md
0086.partition-listhttps://github.com/skytimeline/leetcode/blob/master/problems/86.partition-list.md
0090.subsets-iihttps://github.com/skytimeline/leetcode/blob/master/problems/90.subsets-ii.md
0091.decode-wayshttps://github.com/skytimeline/leetcode/blob/master/problems/91.decode-ways.md
0092.reverse-linked-list-iihttps://github.com/skytimeline/leetcode/blob/master/problems/92.reverse-linked-list-ii.md
0094.binary-tree-inorder-traversalhttps://github.com/skytimeline/leetcode/blob/master/problems/94.binary-tree-inorder-traversal.md
0098.validate-binary-search-treehttps://github.com/skytimeline/leetcode/blob/master/problems/98.validate-binary-search-tree.md
0102.binary-tree-level-order-traversalhttps://github.com/skytimeline/leetcode/blob/master/problems/102.binary-tree-level-order-traversal.md
0103.binary-tree-zigzag-level-order-traversalhttps://github.com/skytimeline/leetcode/blob/master/problems/103.binary-tree-zigzag-level-order-traversal.md
0113.path-sum-iihttps://github.com/skytimeline/leetcode/blob/master/problems/113.path-sum-ii.md
0129.sum-root-to-leaf-numbershttps://github.com/skytimeline/leetcode/blob/master/problems/129.sum-root-to-leaf-numbers.md
0130.surrounded-regionshttps://github.com/skytimeline/leetcode/blob/master/problems/130.surrounded-regions.md
0131.palindrome-partitioninghttps://github.com/skytimeline/leetcode/blob/master/problems/131.palindrome-partitioning.md
0139.word-breakhttps://github.com/skytimeline/leetcode/blob/master/problems/139.word-break.md
0144.binary-tree-preorder-traversalhttps://github.com/skytimeline/leetcode/blob/master/problems/144.binary-tree-preorder-traversal.md
0150.evaluate-reverse-polish-notationhttps://github.com/skytimeline/leetcode/blob/master/problems/150.evaluate-reverse-polish-notation.md
0152.maximum-product-subarrayhttps://github.com/skytimeline/leetcode/blob/master/problems/152.maximum-product-subarray.md
0199.binary-tree-right-side-viewhttps://github.com/skytimeline/leetcode/blob/master/problems/199.binary-tree-right-side-view.md
0200.number-of-islandshttps://github.com/skytimeline/leetcode/blob/master/problems/200.number-of-islands.md
0201.bitwise-and-of-numbers-rangehttps://github.com/skytimeline/leetcode/blob/master/problems/201.bitwise-and-of-numbers-range.md
0208.implement-trie-prefix-treehttps://github.com/skytimeline/leetcode/blob/master/problems/208.implement-trie-prefix-tree.md
0209.minimum-size-subarray-sumhttps://github.com/skytimeline/leetcode/blob/master/problems/209.minimum-size-subarray-sum.md
0215.kth-largest-element-in-an-arrayhttps://github.com/skytimeline/leetcode/blob/master/problems/215.kth-largest-element-in-an-array.md
0221.maximal-squarehttps://github.com/skytimeline/leetcode/blob/master/problems/221.maximal-square.md
0229.majority-element-iihttps://github.com/skytimeline/leetcode/blob/master/problems/229.majority-element-ii.md
0230.kth-smallest-element-in-a-bsthttps://github.com/skytimeline/leetcode/blob/master/problems/230.kth-smallest-element-in-a-bst.md
0236.lowest-common-ancestor-of-a-binary-treehttps://github.com/skytimeline/leetcode/blob/master/problems/236.lowest-common-ancestor-of-a-binary-tree.md
0238.product-of-array-except-selfhttps://github.com/skytimeline/leetcode/blob/master/problems/238.product-of-array-except-self.md
0240.search-a-2-d-matrix-iihttps://github.com/skytimeline/leetcode/blob/master/problems/240.search-a-2-d-matrix-ii.md
0279.perfect-squareshttps://github.com/skytimeline/leetcode/blob/master/problems/279.perfect-squares.md
0309.best-time-to-buy-and-sell-stock-with-cooldownhttps://github.com/skytimeline/leetcode/blob/master/problems/309.best-time-to-buy-and-sell-stock-with-cooldown.md
0322.coin-changehttps://github.com/skytimeline/leetcode/blob/master/problems/322.coin-change.md
0328.odd-even-linked-listhttps://github.com/skytimeline/leetcode/blob/master/problems/328.odd-even-linked-list.md
0334.increasing-triplet-subsequencehttps://github.com/skytimeline/leetcode/blob/master/problems/334.increasing-triplet-subsequence.md
0365.water-and-jug-problemhttps://github.com/skytimeline/leetcode/blob/master/problems/365.water-and-jug-problem.md
0378.kth-smallest-element-in-a-sorted-matrixhttps://github.com/skytimeline/leetcode/blob/master/problems/378.kth-smallest-element-in-a-sorted-matrix.md
0416.partition-equal-subset-sumhttps://github.com/skytimeline/leetcode/blob/master/problems/416.partition-equal-subset-sum.md
0445.add-two-numbers-iihttps://github.com/skytimeline/leetcode/blob/master/problems/445.add-two-numbers-ii.md
0454.4-sum-iihttps://github.com/skytimeline/leetcode/blob/master/problems/454.4-sum-ii.md
0494.target-sumhttps://github.com/skytimeline/leetcode/blob/master/problems/494.target-sum.md
0516.longest-palindromic-subsequencehttps://github.com/skytimeline/leetcode/blob/master/problems/516.longest-palindromic-subsequence.md
0518.coin-change-2https://github.com/skytimeline/leetcode/blob/master/problems/518.coin-change-2.md
0609.find-duplicate-file-in-systemhttps://github.com/skytimeline/leetcode/blob/master/problems/609.find-duplicate-file-in-system.md
0875.koko-eating-bananashttps://github.com/skytimeline/leetcode/blob/master/problems/875.koko-eating-bananas.md
0877.stone-gamehttps://github.com/skytimeline/leetcode/blob/master/problems/877.stone-game.md
0887.super-egg-drophttps://github.com/skytimeline/leetcode/blob/master/problems/887.super-egg-drop.md
0900.rle-iteratorhttps://github.com/skytimeline/leetcode/blob/master/problems/900.rle-iterator.md
1031.maximum-sum-of-two-non-overlapping-subarrayshttps://github.com/skytimeline/leetcode/blob/master/problems/1031.maximum-sum-of-two-non-overlapping-subarrays.md
https://github.com/skytimeline/leetcode#困难难度
0004.median-of-two-sorted-arrayhttps://github.com/skytimeline/leetcode/blob/master/problems/4.median-of-two-sorted-array.md
0023.merge-k-sorted-listshttps://github.com/skytimeline/leetcode/blob/master/problems/23.merge-k-sorted-lists.md
0025.reverse-nodes-in-k-grouphttps://github.com/skytimeline/leetcode/blob/master/problems/25.reverse-nodes-in-k-groups-cn.md
0032.longest-valid-parentheseshttps://github.com/skytimeline/leetcode/blob/master/problems/32.longest-valid-parentheses.md
0042.trapping-rain-waterhttps://github.com/skytimeline/leetcode/blob/master/problems/42.trapping-rain-water.md
0124.binary-tree-maximum-path-sumhttps://github.com/skytimeline/leetcode/blob/master/problems/124.binary-tree-maximum-path-sum.md
0128.longest-consecutive-sequencehttps://github.com/skytimeline/leetcode/blob/master/problems/128.longest-consecutive-sequence.md
0145.binary-tree-postorder-traversalhttps://github.com/skytimeline/leetcode/blob/master/problems/145.binary-tree-postorder-traversal.md
0146.lru-cachehttps://github.com/skytimeline/leetcode/blob/master/problems/146.lru-cache.md
0239.sliding-window-maximumhttps://github.com/skytimeline/leetcode/blob/master/problems/239.sliding-window-maximum.md
0295.find-median-from-data-streamhttps://github.com/skytimeline/leetcode/blob/master/problems/295.find-median-from-data-stream.md
0301.remove-invalid-parentheseshttps://github.com/skytimeline/leetcode/blob/master/problems/301.remove-invalid-parentheses.md
0460.lfu-cachehttps://github.com/skytimeline/leetcode/blob/master/problems/460.lfu-cache.md
1168.optimize-water-distribution-in-a-villagehttps://github.com/skytimeline/leetcode/blob/master/problems/1168.optimize-water-distribution-in-a-village-cn.md
https://github.com/skytimeline/leetcode#数据结构与算法的总结
数据结构https://github.com/skytimeline/leetcode/blob/master/thinkings/basic-data-structure.md
基础算法https://github.com/skytimeline/leetcode/blob/master/thinkings/basic-algorithm.md
二叉树的遍历https://github.com/skytimeline/leetcode/blob/master/thinkings/binary-tree-traversal.md
动态规划https://github.com/skytimeline/leetcode/blob/master/thinkings/dynamic-programming.md
哈夫曼编码和游程编码https://github.com/skytimeline/leetcode/blob/master/thinkings/run-length-encode-and-huffman-encode.md
布隆过滤器https://github.com/skytimeline/leetcode/blob/master/thinkings/bloom-filter.md
字符串问题https://github.com/skytimeline/leetcode/blob/master/thinkings/string-problems.md
https://github.com/skytimeline/leetcode#anki-卡片
anki-cardhttps://github.com/skytimeline/leetcode/blob/master/assets/anki/leetcode.apkg
anki官网https://apps.ankiweb.net/
https://github.com/skytimeline/leetcode#每日一题
每日一题汇总https://github.com/skytimeline/leetcode/blob/master/daily
每日一题认领区https://github.com/azl397985856/leetcode/projects/1
https://github.com/skytimeline/leetcode#计划
anki 卡片 完善https://github.com/skytimeline/leetcode/blob/master/assets/anki
字符串类问题汇总https://github.com/skytimeline/leetcode/blob/master/todo/str
https://github.com/skytimeline/leetcode#关注我
https://github.com/skytimeline/leetcode/blob/master/assets/gongzhonghao.jpeg
https://github.com/skytimeline/leetcode#交流群
https://github.com/skytimeline/leetcode#qq-群
https://github.com/skytimeline/leetcode/blob/master/assets/qq-group-chat.png
https://github.com/skytimeline/leetcode#微信群
https://github.com/skytimeline/leetcode/blob/master/assets/wechat-group-chat.jpeg
https://github.com/skytimeline/leetcode#telegram
http://t.me/leetcode_intlhttp://t.me/leetcode_intl
https://github.com/skytimeline/leetcode#贡献
issuehttps://github.com/azl397985856/leetcode/issues
PRhttps://github.com/azl397985856/leetcode/pulls
这里https://github.com/skytimeline/leetcode/blob/master/assets/drawio
draw.iohttps://www.draw.io/
https://github.com/skytimeline/leetcode#鸣谢
小伙伴https://github.com/azl397985856/leetcode/graphs/contributors
https://github.com/skytimeline/leetcode#license
Apache-2.0https://github.com/skytimeline/leetcode/blob/master/LICENSE.txt
Readme https://github.com/skytimeline/leetcode#readme-ov-file
Apache-2.0 license https://github.com/skytimeline/leetcode#Apache-2.0-1-ov-file
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Activityhttps://github.com/skytimeline/leetcode/activity
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Releaseshttps://github.com/skytimeline/leetcode/releases
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