algo

怎麼練習

1. fork至自己的repository
2. make create-exam產生exam-****-**-**.json檔
3. 依照exam-****-**-**.json的easy、medium、hard題目進行練習
4. 完成題目後填選exam-****-**-**.json題目的Done至true，Familiar依熟悉程度填寫(0: 非常不熟, 1: 不熟, 2: 熟, 3: 很熟)
5. make update-readme更新README.md

Leetcode

arrays&hashing

Name	Star	Difficulty	Familiar	Tags
1. two-sum	⭐⭐⭐	easy
36. valid-sudoku		medium
49. group-anagrams		medium
128. longest-consecutive-sequence	⭐	medium
217. contains-duplicate		easy
238. product-of-array-except-self		medium
242. valid-anagram		easy
271. encode-and-decode-strings		medium
347. top-k-frequent-elements		medium

two-pointers

Name	Star	Difficulty	Familiar	Tags
11. container-with-most-water	⭐⭐⭐	medium
15. 3sum	⭐⭐⭐	unknown	-2	medium
42. trapping-rain-water	⭐⭐⭐	hard
125. valid-palindrome		easy		todo(write)
167. two-sum-ii-input-array-is-sorted	⭐⭐⭐	medium

sliding-window

Name	Star	Difficulty	Familiar	Tags
3. longest-substring-without-repeating-characters	⭐⭐⭐	medium
76. minimum-window-substring	⭐	hard
121. best-time-to-buy-and-sell-stock	⭐	easy		todo(write)
239. sliding-window-maximum	⭐	hard
424. longest-repeating-character-replacement		medium
567. permutation-in-string		medium

stack

Name	Star	Difficulty	Familiar	Tags
20. valid-parentheses	⭐	easy		todo(write)
22. generate-parentheses	⭐⭐	medium		todo(write)
84. largest-rectangle-in-histogram	⭐⭐	hard
150. evaluate-reverse-polish-notation	⭐	medium
155. min-stack	⭐	medium
739. daily-temperatures	⭐	medium
853. car-fleet	⭐	medium

binary-search

Name	Star	Difficulty	Familiar	Tags
4. median-of-two-sorted-arrays	⭐⭐⭐	hard
33. search-in-rotated-sorted-array	⭐⭐	medium
74. search-a-2d-matrix	⭐	medium
153. find-minimum-in-rotated-sorted-array	⭐	medium
704. binary-search	⭐⭐⭐	easy	-1
875. koko-eating-bananas	⭐	medium
981. time-based-key-value-store	⭐⭐	medium

linked-list

Name	Star	Difficulty	Familiar	Tags
2. add-two-numbers		medium
19. remove-nth-node-from-end-of-list	⭐	medium
21. merge-two-sorted-lists	⭐⭐⭐	easy	-2
23. merge-k-sorted-lists	⭐⭐⭐	hard
25. reverse-nodes-in-k-group	⭐⭐	hard
138. copy-list-with-random-pointer	⭐⭐⭐	medium
141. linked-list-cycle	⭐⭐⭐	easy	0	todo(write)
143. reorder-list	⭐	medium
146. lru-cache	⭐⭐⭐	medium		todo(write)
206. reverse-linked-list	⭐	easy
287. find-the-duplicate-number	⭐⭐⭐	medium

trees

Name	Star	Difficulty	Familiar	Tags
98. validate-binary-search-tree	⭐	medium
100. same-tree	⭐	easy		todo(write)
102. binary-tree-level-order-traversal	⭐	medium
104. maximum-depth-of-binary-tree	⭐⭐⭐	easy	0
105. construct-binary-tree-from-preorder-and-inorder-traversal	⭐⭐	medium
110. balanced-binary-tree	⭐⭐	easy		todo(write)
124. binary-tree-maximum-path-sum	⭐⭐⭐	hard
199. binary-tree-right-side-view	⭐⭐	medium
226. invert-binary-tree	⭐	easy		todo(write)
230. kth-smallest-element-in-a-bst	⭐⭐	medium
235. lowest-common-ancestor-of-a-binary-search-tree	⭐⭐	medium		todo(write)
297. serialize-and-deserialize-binary-tree	⭐	hard
543. diameter-of-binary-tree	⭐	easy
572. subtree-of-another-tree	⭐⭐	easy	-1
1448. count-good-nodes-in-binary-tree	⭐⭐	medium

tries

Name	Star	Difficulty	Familiar	Tags
208. implement-trie-prefix-tree		medium
211. design-add-and-search-words-data-structure		medium
212. word-search-ii	⭐⭐⭐	hard

heap(priority-queue)

Name	Star	Difficulty	Familiar	Tags
215. kth-largest-element-in-an-array	⭐	medium		PR
295. find-median-from-data-stream	⭐⭐	hard
355. design-twitter	⭐⭐⭐	medium
621. task-scheduler	⭐⭐⭐	medium
703. kth-largest-element-in-a-stream	⭐	easy
973. k-closest-points-to-origin	⭐⭐	medium
1046. last-stone-weight	⭐⭐	easy

backtracking

Name	Star	Difficulty	Familiar	Tags
17. letter-combinations-of-a-phone-number	⭐	medium
39. combination-sum	⭐⭐⭐	medium
40. combination-sum-ii	⭐⭐⭐	medium
46. permutations	⭐⭐	medium
51. n-queens	⭐⭐⭐	hard
78. subsets	⭐⭐⭐	medium
79. word-search	⭐⭐	medium
90. subsets-ii	⭐⭐⭐	medium
131. palindrome-partitioning	⭐	medium

graphs

Name	Star	Difficulty	Familiar	Tags
127. word-ladder	⭐⭐	hard
130. surrounded-regions	⭐⭐	medium		todo(write)
133. clone-graph	⭐	medium
200. number-of-islands	⭐	medium		todo(write)
207. course-schedule	⭐⭐	medium
210. course-schedule-ii	⭐⭐⭐	medium		topological-sort
261. graph-valid-tree		medium		union-find, dfs, leet-code-premium
286. walls-and-gates		medium		bfs, leet-code-premium
323. number-of-connected-components-in-an-undirected-graph		medium		union-find, leet-code-premium
417. pacific-atlantic-water-flow	⭐⭐⭐	medium		todo(write)
684. redundant-connection		medium		union-find
695. max-area-of-island	⭐	medium
994. rotting-oranges	⭐⭐	medium

advanced-graphs

Name	Star	Difficulty	Familiar	Tags
269. alien-dictionary	⭐⭐⭐	hard		PR, YT, leet-code-premium
332. reconstruct-itinerary	⭐⭐⭐	hard		PR
743. network-delay-time	⭐⭐⭐	medium		dijkstra's-algo
778. swim-in-rising-water	⭐⭐⭐	hard		dijkstra's-algo
787. cheapest-flights-within-k-stops	⭐⭐⭐	medium		bellman-ford-algo
1584. min-cost-to-connect-all-points	⭐⭐⭐	medium		prim's-algo, kruskal-algo(todo), leet-code-premium, heap

1d-dp

Name	Star	Difficulty	Familiar	Tags
5. longest-palindromic-substring		medium
70. climbing-stairs	⭐⭐⭐	easy		todo(write)
91. decode-ways	⭐⭐⭐	medium
139. word-break	⭐⭐	medium
152. maximum-product-subarray		medium		todo(write)
198. house-robber	⭐	medium
213. house-robber-ii	⭐⭐⭐	medium
300. longest-increasing-subsequence	⭐	medium		todo(write)
322. coin-change	⭐⭐⭐	medium	-2
416. partition-equal-subset-sum	⭐⭐	medium
647. palindromic-substrings	⭐	medium
746. min-cost-climbing-stairs	⭐⭐	easy

2d-dp

Name	Star	Difficulty	Familiar	Tags
10. regular-expression-matching		hard
62. unique-paths		medium		math(todo)
72. edit-distance	⭐⭐⭐	medium		todo(write)
97. interleaving-string	⭐⭐⭐	medium		dfs
115. distinct-subsequences	⭐⭐⭐	hard		lcs
309. best-time-to-buy-and-sell-stock-with-cooldown	⭐⭐⭐	medium		dfs, todo-space-optimize
312. burst-balloons	⭐⭐	hard
329. longest-increasing-path-in-a-matrix	⭐⭐	hard		topological-sort
494. target-sum	⭐⭐⭐	medium	-2	dfs
518. coin-change-ii	⭐⭐⭐	medium		dfs
1143. longest-common-subsequence	⭐⭐⭐	medium		todo(write)

greedy

Name	Star	Difficulty	Familiar	Tags
45. jump-game-ii		medium		dp(todo)
53. maximum-subarray	⭐⭐	medium
55. jump-game	⭐⭐⭐	medium	-1
134. gas-station	⭐⭐	medium
678. valid-parenthesis-string		medium
763. partition-labels		medium
846. hand-of-straights		medium
1899. merge-triplets-to-form-target-triplet		medium

intervals

Name	Star	Difficulty	Familiar	Tags
56. merge-intervals		medium
57. insert-interval		medium
253. meeting-rooms-ii		medium
435. non-overlapping-intervals		medium
920. meeting-rooms		hard
1851. minimum-interval-to-include-each-query		hard

math&geometry

Name	Star	Difficulty	Familiar	Tags
43. multiply-strings		medium
48. rotate-image		medium	1
50. powx-n		medium
54. spiral-matrix		medium
66. plus-one		easy
73. set-matrix-zeroes		medium
202. happy-number	⭐⭐	easy
213. detect-squares		medium

bit-manipulation

Name	Star	Difficulty	Familiar	Tags
7. reverse-integer		medium		PR
136. single-number		easy
190. reverse-bits		easy	1
191. number-of-1-bits		easy
268. missing-number		easy
338. counting-bits		easy
371. sum-of-two-integers		medium

todo

Name	Star	Difficulty	Familiar	Tags