tangweikun / leetcode

:zap: Leetcode Solutions

🔥 Leetcode 🔥

Practice make Perfect

• 🎉 Unit test with jest
• ✨ Simple code
• 🎨 Readable code

Getting Start

git clone https://github.com/tangweikun/leetcode.git
cd leetcode
npm install
npm run test // also you can run `npm run watch`

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Contents

#	Title	README	Difficulty	LeetCode	TAGS
1	compare-version-numbers	📗	Easy	LeetCode	String
2	set-matrix-zeroes	📗	Easy	LeetCode	Array
3	triangle	📗	Medium	LeetCode	DP
4	length-of-last-word	📗	Easy	LeetCode	String
5	baseball-game	📗	Easy	LeetCode	Stack
6	132-pattern	📗	Medium	LeetCode	Stack
7	LongestCommonPrefix	📗	Easy	LeetCode	String
8	longest-substring-without-repeating-characters	📗	Easy	LeetCode	String
9	global-and-local-inversions	📗	Medium	LeetCode	Array
10	min-stack	📗	Medium	LeetCode	Stack
11	rotate-image	📗	Medium	LeetCode	Array
12	task-scheduler	📗	Medium	LeetCode	Array
13	search-insert-position	📗	Easy	LeetCode	BinarySearch
14	judge-route-circle	📗	Easy	LeetCode	String
15	advantage-shuffle	📗	Medium	LeetCode	Array
16	number-of-matching-subsequences	📗	Medium	LeetCode	Array
17	valid-parentheses	📗	Easy	LeetCode	String
18	power-of-two	📗	Easy	LeetCode	Math
19	number-of-1-bits	📗	Easy	LeetCode	Bit
20	my-calendar-ii	📗	Easy	LeetCode	Array
21	subdomain-visit-count	📗	Easy	LeetCode	HashTable
22	top-k-frequent-elements	📗	Medium	LeetCode	HashTable
23	climbing-stairs	📗	Easy	LeetCode	DP
24	remove-element	📗	Easy	LeetCode	Array
25	implement-strstr	📗	Easy	LeetCode	String
26	largest-number-at-least-twice-of-others	📗	Easy	LeetCode	Array
27	powx-n	📗	Easy	LeetCode	Math
28	replace-words	📗	Medium	LeetCode	HashTable
29	remove-duplicates-from-sorted-array	📗	Easy	LeetCode	Two Pointer
30	roman-to-integer	📗	Easy	LeetCode	Math
31	maximum-subarray	📗	Easy	LeetCode	Array
32	plus-one	📗	Easy	LeetCode	Math
33	add-binary	📗	Easy	LeetCode	Math
34	sqrtx	📗	Easy	LeetCode	Math
35	merge-sorted-array	📗	Easy	LeetCode	Array
36	count-and-say	📗	Easy	LeetCode	String
37	best-time-to-buy-and-sell-stock	📗	Easy	LeetCode	Array
38	best-time-to-buy-and-sell-stock-ii	📗	Easy	LeetCode	Array
39	valid-palindrome	📗	Easy	LeetCode	TwoPointers
40	single-number	📗	Easy	LeetCode	Bit
41	two-sum-ii-input-array-is-sorted	📗	Easy	LeetCode	Array
42	rotate-array	📗	Easy	LeetCode	Array
43	reverse-bits	📗	Easy	LeetCode	Bit
44	asteroid-collision	📗	Medium	LeetCode	Stack
45	top-k-frequent-words	📗	Medium	LeetCode	HashTable
46	contiguous-array	📗	Medium	LeetCode	HashTable
47	group-anagrams	📗	Easy	LeetCode	HashTable
48	happy-number	📗	Easy	LeetCode	Math
49	fizz-buzz	📗	Easy	LeetCode	Math
50	hamming-distance	📗	Easy	LeetCode	Bit
51	intersection-of-two-arrays	📗	Easy	LeetCode	TowPointers
52	intersection-of-two-arrays-ii	📗	Easy	LeetCode	TwoPointers
53	island-perimeter	📗	Easy	LeetCode	HashTable
54	keyboard-row	📗	Easy	LeetCode	HashTable
55	longest-palindrome	📗	Easy	LeetCode	HashTable
56	longest-continuous-increasing-subsequence	📗	Easy	LeetCode	Array
57	longest-harmonious-subsequence	📗	Easy	LeetCode	HashTable
58	first-unique-character-in-a-string	📗	Easy	LeetCode	String
59	find-the-difference	📗	Easy	LeetCode	HashTable
60	add-digits	📗	Easy	LeetCode	Math
61	add-strings	📗	Easy	LeetCode	Math
62	array-partition-i	📗	Easy	LeetCode	Array
63	arranging-coins	📗	Easy	LeetCode	Math
64	contains-duplicate	📗	Easy	LeetCode	Array
65	contains-duplicate-ii	📗	Easy	LeetCode	Array
66	count-binary-substrings	📗	Easy	LeetCode	String
67	detect-capital	📗	Easy	LeetCode	String
68	distribute-candies	📗	Easy	LeetCode	HashTable
69	count-primes	📗	Easy	LeetCode	Math
70	base-7	📗	Easy	LeetCode
71	power-of-three	📗	Easy	LeetCode	Math
72	power-of-four	📗	Easy	LeetCode	math
73	number-of-segments-in-a-string	📗	Easy	LeetCode	String
74	reverse-string	📗	Easy	LeetCode	String
75	reverse-string-ii	📗	Easy	LeetCode	String
76	reverse-words-in-a-string-iii	📗	Easy	LeetCode	String
77	reverse-vowels-of-a-string	📗	Easy	LeetCode	String
78	ugly-number	📗	Easy	LeetCode	Math
79	valid-anagram	📗	Easy	LeetCode	HashTable
80	valid-palindrome-ii	📗	Easy	LeetCode	String
81	word-pattern	📗	Easy	LeetCode	HashTable
82	binary-number-with-alternating-bits	📗	Easy	LeetCode	Bit
83	find-all-anagrams-in-a-string	📗	Easy	LeetCode	HashTable
84	factorial-trailing-zeroes	📗	Easy	LeetCode	Math
85	find-smallest-letter-greater-than-target	📗	Easy	LeetCode	BinarySearch
86	find-pivot-index	📗	Easy	LeetCode	Array
87	license-key-formatting	📗	Easy	LeetCode
88	longest-uncommon-subsequence-i	📗	Easy	LeetCode	String
89	majority-element	📗	Easy	LeetCode	Array
90	perfect-number	📗	Easy	LeetCode	Math
91	prime-number-of-set-bits-in-binary-representation	📗	Easy	LeetCode	Bit
92	number-complement	📗	Easy	LeetCode	Bit
93	move-zeroes	📗	Easy	LeetCode	Array
94	relative-ranks	📗	Easy	LeetCode
95	valid-perfect-square	📗	Easy	LeetCode	Math
96	string-compression	📗	Easy	LeetCode	String
97	student-attendance-record-i	📗	Easy	LeetCode	String
98	max-consecutive-ones	📗	Easy	LeetCode	Array
99	maximum-average-subarray-i	📗	Easy	LeetCode	Array
100	minimum-index-sum-of-two-lists	📗	Easy	LeetCode
101	sum-of-square-numbers	📗	Easy	LeetCode	Math
102	set-mismatch	📗	Easy	LeetCode	Math
103	find-the-duplicate-number	📗	Medium	LeetCode	Math
104	self-dividing-numbers	📗	Easy	LeetCode	Math
105	missing-number	📗	Easy	LeetCode	Math
106	maximum-product-of-three-numbers	📗	Easy	LeetCode	Math
107	complex-number-multiplication	📗	Medium	LeetCode	Math
108	ugly-number-ii	📗	Medium	LeetCode	Math, DP
109	valid-square	📗	Medium	LeetCode	Math
110	1-bit-and-2-bit-characters	📗	Easy	LeetCode	Array
111	can-place-flowers	📗	Easy	LeetCode	Array
112	find-all-numbers-disappeared-in-an-array	📗	Easy	LeetCode	Array
113	container-with-most-water	📗	Medium	LeetCode	Array
114	degree-of-an-array	📗	Easy	LeetCode	Array
115	find-all-duplicates-in-an-array	📗	Easy	LeetCode	Array
116	find-minimum-in-rotated-sorted-array	📗	Easy	LeetCode	Array
117	find-minimum-in-rotated-sorted-array-ii	📗	Easy	LeetCode	Array
118	find-peak-element	📗	Medium	LeetCode	Array
119	jump-game	📗	Medium	LeetCode	DP
120	jump-game-ii	📗	Hard	LeetCode	DP
121	max-chunks-to-make-sorted	📗	Medium	LeetCode	Array
122	maximum-swap	📗	Medium	LeetCode	Array
123	min-cost-climbing-stairs	📗	Medium	LeetCode	DP
124	minimum-size-subarray-sum	📗	Medium	LeetCode	Array
125	remove-duplicates-from-sorted-array-ii	📗	Medium	LeetCode	Array
126	search-for-a-range	📗	Medium	LeetCode	Array
127	subarray-product-less-than-k	📗	Medium	LeetCode	Array
128	daily-temperatures	📗	Medium	LeetCode	Stack
129	sum-of-two-integers	📗	Easy	LeetCode	Bit
130	jewels-and-stones	📗	Easy	LeetCode	HashTable
131	number-of-boomerangs	📗	Easy	LeetCode	HashTable
132	isomorphic-strings	📗	Easy	LeetCode	HashTable
133	counting-bits	📗	Easy	LeetCode	Bit
134	valid-triangle-number	📗	Medium	LeetCode	Array
135	repeated-substring-pattern	📗	Easy	LeetCode	String
136	maximum-depth-of-binary-tree	📗	Easy	LeetCode	BinaryTree
137	merge-two-binary-trees	📗	Easy	LeetCode	BinaryTree
138	average-of-levels-in-binary-tree	📗	Easy	LeetCode	BinaryTree
139	find-duplicate-subtrees	📗	Medium	LeetCode	BinaryTree
140	minimum-window-substring	📗	Hard	LeetCode	String
141	invert-binary-tree	📗	Easy	LeetCode	BinaryTree
142	two-sum-iv-input-is-a-bst	📗	Easy	LeetCode	BinaryTree
143	same-tree	📗	Easy	LeetCode	BinaryTree
144	sum-of-left-leaves	📗	Easy	LeetCode	BinaryTree
145	trim-a-binary-search-tree	📗	Easy	LeetCode	BinaryTree
146	toeplitz-matrix	📗	Easy	LeetCode	Array
147	reshape-the-matrix	📗	Easy	LeetCode	Array
148	next-greater-element-i	📗	Easy	LeetCode	Array
149	nim-game	📗	Easy	LeetCode	BrainTeaser
150	rotated-digits	📗	Easy	LeetCode	String
151	excel-sheet-column-number	📗	Easy	LeetCode	Math
152	ransom-note	📗	Easy	LeetCode	String
153	k-diff-pairs-in-an-array	📗	Easy	LeetCode	Array
154	third-maximum-number	📗	Easy	LeetCode	Array
155	single-element-in-a-sorted-array	📗	Medium	LeetCode	Array
156	single-number-iii	📗	Medium	LeetCode	Array
157	arithmetic-slices	📗	Medium	LeetCode	Math,DP
158	palindromic-substrings	📗	Medium	LeetCode	String,DP
159	maximum-xor-of-two-numbers-in-an-array	📗	Medium	LeetCode	Bit
160	sort-characters-by-frequency	📗	Medium	LeetCode	HashTable
161	rotate-string	📗	Medium	LeetCode	String
162	product-of-array-except-self	📗	Medium	LeetCode	Array
163	teemo-attacking	📗	Medium	LeetCode	Array
164	queue-reconstruction-by-height	📗	Medium	LeetCode	Greedy
165	4sum-ii	📗	Medium	LeetCode	HashTable
166	01-matrix	📗	Medium	LeetCode	HashTable
167	3sum	📗	Medium	LeetCode	TwoPointers
168	3sum-closest	📗	Medium	LeetCode	TwoPointers
169	4Sum	📗	Medium	LeetCode	TwoPointers
170	add-two-numbers	📗	Medium	LeetCode	LinkedList
171	add-two-numbers-ii	📗	Medium	LeetCode	LinkedList
172	add-and-search-word-data-structure-design	📗	Medium	LeetCode	LinkedList
173	additive-number	📗	Medium	LeetCode	String
174	assign-cookies	📗	Easy	LeetCode	Greedy
175	basic-calculator	📗	Medium	LeetCode	Stack
176	basic-calculator-ii	📗	Medium	LeetCode	Stack
177	target-sum	📗	Medium	LeetCode	DP
178	implement-queue-using-stacks	📗	Easy	LeetCode	Stack
179	implement-stack-using-queues	📗	Easy	LeetCode	Stack
180	next-greater-element-ii	📗	Medium	LeetCode	Stack
181	binary-tree-tilt	📗	Easy	LeetCode	Tree
182	diameter-of-binary-tree	📗	Easy	LeetCode	Tree
183	symmetric-tree	📗	Easy	LeetCode	Tree
184	second-minimum-node-in-a-binary-tree	📗	Easy	LeetCode	Tree
185	subtree-of-another-tree	📗	Easy	LeetCode	Tree
186	binary-tree-paths	📗	Easy	LeetCode	DFS
187	path-sum	📗	Easy	LeetCode	DFS
188	minimum-depth-of-binary-tree	📗	Easy	LeetCode	DFS
189	find-bottom-left-tree-value	📗	Medium	LeetCode	DFS
190	decode-string	📗	Medium	LeetCode	DFS,Stack
191	find-largest-value-in-each-tree-row	📗	Medium	LeetCode	DFS
192	max-area-of-island	📗	Easy	LeetCode	DFS
193	flood-fill	📗	Easy	LeetCode	DFS
194	balanced-binary-tree	📗	Easy	LeetCode	DFS
195	friend-circles	📗	Medium	LeetCode	DFS
196	house-robber-iii	📗	Medium	LeetCode	DFS
197	increasing-subsequences	📗	Medium	LeetCode	DFS
198	sum-root-to-leaf-numbers	📗	Medium	LeetCode	DFS
199	number-of-islands	📗	Medium	LeetCode	DFS
200	path-sum-ii	📗	Medium	LeetCode	DFS
201	matchsticks-to-square	📗	Medium	LeetCode	DFS
202	two-sum	📗	Easy	LeetCode	Array
203	unique-morse-code-words	📗	Easy	LeetCode	Hash
204	image-smoother	📗	Easy	LeetCode	Array
205	pascals-triangle	📗	Easy	LeetCode	Array
206	pascals-triangle-ii	📗	Easy	LeetCode	Array
207	shortest-unsorted-continuous-subarray	📗	Easy	LeetCode	Array
208	Non-decreasingArray	📗	Easy	LeetCode	Array
209	range-addition-ii	📗	Easy	LeetCode	Math
210	repeated-string-match	📗	Easy	LeetCode	Math
211	house-robber	📗	Easy	LeetCode	DP
212	minimum-ascii-delete-sum-for-two-strings	📗	Medium	LeetCode	DP
213	maximum-length-of-pair-chain	📗	Medium	LeetCode	DP,Greedy
214	integer-break	📗	Medium	LeetCode	DP
215	count-numbers-with-unique-digits	📗	Medium	LeetCode	DP
216	best-time-to-buy-and-sell-stock-with-transaction-fee	📗	Medium	LeetCode	DP,Greedy
217	shopping-offers	📗	Medium	LeetCode	DP,DFS
218	predict-the-winner	📗	Medium	LeetCode	DP
219	2-keys-keyboard	📗	Medium	LeetCode	DP
220	is-subsequence	📗	Medium	LeetCode	DP
221	delete-and-earn	📗	Medium	LeetCode	DP
222	longest-palindromic-subsequence	📗	Medium	LeetCode	DP
223	combination-sum-iv	📗	Medium	LeetCode	DP
224	maximum-length-of-repeated-subarray	📗	Medium	LeetCode	DP
225	minimum-path-sum	📗	Medium	LeetCode	DP
226	largest-sum-of-averages	📗	Medium	LeetCode	DP
227	longest-increasing-subsequence	📗	Medium	LeetCode	DP
228	partition-equal-subset-sum	📗	Medium	LeetCode	DP
229	flipping-an-image	📗	Easy	LeetCode	Array
230	positions-of-large-groups	📗	Easy	LeetCode	Array
231	magic-squares-in-grid	📗	Easy	LeetCode	Array
232	array-nesting	📗	Medium	LeetCode	Array
233	combination-sum-iii	📗	Medium	LeetCode	Backtracking
234	subsets	📗	Medium	LeetCode	Backtracking
235	my-calendar-i	📗	Medium	LeetCode	Array
236	combination-sum	📗	Medium	LeetCode	Backtracking
237	spiral-matrix-ii	📗	Medium	LeetCode	Backtracking
238	number-of-subarrays-with-bounded-maximum	📗	Medium	LeetCode	Array
239	subarray-sum-equals-k	📗	Medium	LeetCode	HashTable
240	sort-colors	📗	Medium	LeetCode	HashTable
241	subsets-ii	📗	Medium	LeetCode	Backtracking
242	summary-ranges	📗	Medium	LeetCode	Array
243	merge-intervals	📗	Medium	LeetCode	Array
244	minimum-moves-to-equal-array-elements	📗	Easy	LeetCode	Math
245	minimum-moves-to-equal-array-elements-ii	📗	Easy	LeetCode	Math
246	backspace-string-compare	📗	Easy	LeetCode	Stack
247	partition-labels	📗	Medium	LeetCode	TwoPointers,Greedy
248	peak-index-in-a-mountain-array	📗	Easy	LeetCode	BinarySearch
249	goat-latin	📗	Easy	LeetCode	String
250	custom-sort-string	📗	Medium	LeetCode	String
251	nth-digit	📗	Easy	LeetCode	Math
252	transpose-matrix	📗	Easy	LeetCode	Array
253	maximize-distance-to-closest-person	📗	Easy	LeetCode	Array
254	bulls-and-cows	📗	Medium	LeetCode	HashTable
255	construct-the-rectangle	📗	Easy	LeetCode	Math
256	most-common-word	📗	Easy	LeetCode	String
257	shortest-distance-to-a-character	📗	Easy	LeetCode	String
258	binary-gap	📗	Easy	LeetCode	String
259	lemonade-change	📗	Easy	LeetCode	Greedy
260	excel-sheet-column-title	📗	Easy	LeetCode	Math
261	largest-triangle-area	📗	Easy	LeetCode	Math
262	reordered-power-of-2	📗	Medium	LeetCode	Math
263	spiral-matrix		Medium	LeetCode	Math
264	long-pressed-name		Easy	LeetCode	String
265	uncommon-words-from-two-sentences		Easy	LeetCode	String
266	reverse-only-letters		Easy	LeetCode	String
267	powerful-integers		Easy	LeetCode	Math
268	minimum-add-to-make-parentheses-valid		Easy	LeetCode	String

Collaborators

_{weikun tang}