✏️ Leetcode Solutions with Cpp,Javascript,Python

Update time: 2018-09-12 22:01:06

I have solved 203 / 851 problems while there are 139 problems still locked.

If you want to use this tool please follow this Usage Guide

If you have any question, please give me an issue.

If you are loving solving problems in leetcode, please contact me to enjoy it together!

(Notes: 🔒 means you need to buy a book from Leetcode to unlock the problem)

#	Title	Source Code	Article	Difficulty
1	two-sum	Javascript	📝	Easy
2	add-two-numbers	Javascript	📝	Medium
3	longest-substring-without-repeating-characters	Javascript	📝	Medium
4	median-of-two-sorted-arrays	Javascript	📝	Hard
5	longest-palindromic-substring	Javascript	📝	Medium
6	zigzag-conversion	Javascript	📝	Medium
7	reverse-integer	Javascript	📝	Easy
8	string-to-integer-atoi	Javascript		Medium
9	palindrome-number	Javascript	📝	Easy
10	regular-expression-matching	Javascript	📝	Hard
11	container-with-most-water	Javascript	📝	Medium
12	integer-to-roman	Javascript		Medium
13	roman-to-integer	Javascript		Easy
14	longest-common-prefix	Javascript	📝	Easy
15	3sum	Javascript		Medium
16	3sum-closest	Javascript		Medium
17	letter-combinations-of-a-phone-number	Javascript		Medium
18	4sum	Javascript		Medium
19	remove-nth-node-from-end-of-list	Javascript	📝	Medium
20	valid-parentheses	Javascript		Easy
21	merge-two-sorted-lists	Javascript	📝	Easy
22	generate-parentheses	Javascript	📝	Medium
23	merge-k-sorted-lists	Javascript	📝	Hard
24	swap-nodes-in-pairs	Javascript		Medium
25	reverse-nodes-in-k-group	Javascript		Hard
26	remove-duplicates-from-sorted-array	Javascript	📝	Easy
27	remove-element	Javascript	📝	Easy
28	implement-strstr	Javascript Cpp		Easy
29	divide-two-integers	Javascript		Medium
30	substring-with-concatenation-of-all-words	Javascript		Hard
31	next-permutation	Javascript	📝	Medium
32	longest-valid-parentheses	Javascript	📝	Hard
33	search-in-rotated-sorted-array	Javascript		Medium
34	find-first-and-last-position-of-element-in-sorted-array	Javascript	📝	Medium
35	search-insert-position	Javascript		Easy
36	valid-sudoku	Javascript		Medium
37	sudoku-solver	Javascript		Hard
38	count-and-say	Javascript		Easy
39	combination-sum	Javascript		Medium
40	combination-sum-ii	Javascript		Medium
41	first-missing-positive	Javascript		Hard
42	trapping-rain-water	Javascript	📝	Hard
43	multiply-strings	Javascript		Medium
44	wildcard-matching	Javascript		Hard
45	jump-game-ii	Javascript		Hard
46	permutations	Javascript		Medium
47	permutations-ii	Javascript		Medium
48	rotate-image	Python Javascript		Medium
49	group-anagrams	Javascript	📝	Medium
50	powx-n	Javascript	📝	Medium
51	n-queens	Javascript		Hard
52	n-queens-ii	Javascript		Hard
53	maximum-subarray	Javascript		Easy
54	spiral-matrix	Javascript	📝	Medium
55	jump-game	Javascript	📝	Medium
56	merge-intervals	Javascript	📝	Medium
57	insert-interval	Javascript		Hard
58	length-of-last-word	Javascript		Easy
59	spiral-matrix-ii	Javascript		Medium
60	permutation-sequence	Javascript		Medium
61	rotate-list	Javascript		Medium
62	unique-paths	Javascript		Medium
63	unique-paths-ii	Javascript		Medium
64	minimum-path-sum	Javascript	📝	Medium
65	valid-number	Javascript		Hard
66	plus-one	Javascript		Easy
67	add-binary	Javascript		Easy
68	text-justification	Javascript		Hard
69	sqrtx	Javascript		Easy
70	climbing-stairs	Javascript	📝	Easy
71	simplify-path	Javascript		Medium
72	edit-distance	Javascript		Hard
73	set-matrix-zeroes	Javascript		Medium
74	search-a-2d-matrix	Javascript		Medium
75	sort-colors	Javascript		Medium
76	minimum-window-substring	Javascript	📝	Hard
77	combinations	Javascript		Medium
78	subsets	Javascript		Medium
79	word-search	Javascript		Medium
80	remove-duplicates-from-sorted-array-ii	Javascript		Medium
81	search-in-rotated-sorted-array-ii	Javascript		Medium
82	remove-duplicates-from-sorted-list-ii	Javascript		Medium
83	remove-duplicates-from-sorted-list	Javascript	📝	Easy
84	largest-rectangle-in-histogram	Javascript	📝	Hard
85	maximal-rectangle	Javascript		Hard
86	partition-list	Javascript		Medium
87	scramble-string	Javascript		Hard
88	merge-sorted-array	Javascript		Easy
89	gray-code	Javascript		Medium
90	subsets-ii	Javascript		Medium
91	decode-ways	Javascript		Medium
92	reverse-linked-list-ii	Javascript		Medium
93	restore-ip-addresses	Javascript		Medium
94	binary-tree-inorder-traversal	Javascript	📝	Medium
95	unique-binary-search-trees-ii	Javascript		Medium
96	unique-binary-search-trees	Javascript	📝	Medium
97	interleaving-string	Javascript	📝	Hard
98	validate-binary-search-tree	Javascript		Medium
99	recover-binary-search-tree	Javascript		Hard
100	same-tree	Javascript		Easy
101	symmetric-tree	Javascript	📝	Easy
102	binary-tree-level-order-traversal	Javascript		Medium
103	binary-tree-zigzag-level-order-traversal	Javascript		Medium
104	maximum-depth-of-binary-tree	Javascript		Easy
105	construct-binary-tree-from-preorder-and-inorder-traversal	Javascript		Medium
106	construct-binary-tree-from-inorder-and-postorder-traversal	Javascript		Medium
107	binary-tree-level-order-traversal-ii	Javascript		Easy
108	convert-sorted-array-to-binary-search-tree	Javascript		Easy
109	convert-sorted-list-to-binary-search-tree	Javascript		Medium
110	balanced-binary-tree	Javascript		Easy
111	minimum-depth-of-binary-tree	Javascript		Easy
112	path-sum	Javascript		Easy
113	path-sum-ii	Javascript		Medium
114	flatten-binary-tree-to-linked-list	Javascript		Medium
115	distinct-subsequences	Cpp		Hard
116	populating-next-right-pointers-in-each-node	Cpp		Medium
117	populating-next-right-pointers-in-each-node-ii	Cpp		Medium
118	pascals-triangle	Cpp	📝	Easy
119	pascals-triangle-ii	Cpp		Easy
120	triangle	Cpp		Medium
121	best-time-to-buy-and-sell-stock	Javascript Cpp	📝	Easy
122	best-time-to-buy-and-sell-stock-ii	Cpp	📝	Easy
123	best-time-to-buy-and-sell-stock-iii	Cpp		Hard
124	binary-tree-maximum-path-sum	Cpp		Hard
125	valid-palindrome	Cpp		Easy
126	word-ladder-ii	Cpp		Hard
127	word-ladder	Cpp		Medium
128	longest-consecutive-sequence	Cpp	📝	Hard
129	sum-root-to-leaf-numbers	Cpp		Medium
130	surrounded-regions	Cpp		Medium
131	palindrome-partitioning	Cpp		Medium
132	palindrome-partitioning-ii	Cpp		Hard
133	clone-graph	Cpp		Medium
134	gas-station	Cpp		Medium
135	candy	Cpp	📝	Hard
136	single-number	Cpp	📝	Easy
137	single-number-ii	Cpp		Medium
138	copy-list-with-random-pointer	Cpp	📝	Medium
139	word-break	Cpp	📝	Medium
140	word-break-ii	Cpp	📝	Hard
141	linked-list-cycle	Cpp	📝	Easy
142	linked-list-cycle-ii	Cpp	📝	Medium
143	reorder-list	Cpp		Medium
144	binary-tree-preorder-traversal	Cpp		Medium
145	binary-tree-postorder-traversal	Cpp		Hard
146	lru-cache	Cpp		Hard
147	insertion-sort-list	Cpp		Medium
148	sort-list	Cpp		Medium
149	max-points-on-a-line	Cpp		Hard
150	evaluate-reverse-polish-notation	Cpp		Medium
151	reverse-words-in-a-string	Cpp		Medium
152	maximum-product-subarray	Cpp		Medium
153	find-minimum-in-rotated-sorted-array	Cpp	📝	Medium
154	find-minimum-in-rotated-sorted-array-ii	Cpp		Hard
155	min-stack	Cpp		Easy
156	binary-tree-upside-down	🔒		Medium
157	read-n-characters-given-read4	🔒		Easy
158	read-n-characters-given-read4-ii-call-multiple-times	🔒		Hard
159	longest-substring-with-at-most-two-distinct-characters	🔒		Hard
160	intersection-of-two-linked-lists	Cpp	📝	Easy
161	one-edit-distance	🔒		Medium
162	find-peak-element	Cpp	📝	Medium
163	missing-ranges	🔒		Medium
164	maximum-gap	Cpp	📝	Hard
165	compare-version-numbers	Javascript Cpp		Medium
166	fraction-to-recurring-decimal	Cpp	📝	Medium
167	two-sum-ii-input-array-is-sorted	Cpp	📝	Easy
168	excel-sheet-column-title	Cpp		Easy
169	majority-element	Javascript Cpp	📝	Easy
170	two-sum-iii-data-structure-design	🔒		Easy
171	excel-sheet-column-number	Cpp		Easy
172	factorial-trailing-zeroes	Cpp		Easy
173	binary-search-tree-iterator	Cpp		Medium
174	dungeon-game	Cpp		Hard
179	largest-number	Cpp	📝	Medium
186	reverse-words-in-a-string-ii	🔒		Medium
187	repeated-dna-sequences	Cpp		Medium
188	best-time-to-buy-and-sell-stock-iv	Cpp		Hard
189	rotate-array	Javascript Cpp	📝	Easy
190	reverse-bits	Javascript Cpp		Easy
191	number-of-1-bits	Javascript Cpp	📝	Easy
198	house-robber	Cpp	📝	Easy
199	binary-tree-right-side-view	Cpp	📝	Medium
200	number-of-islands	Cpp	📝	Medium
201	bitwise-and-of-numbers-range	Cpp		Medium
202	happy-number	Cpp		Easy
203	remove-linked-list-elements	Cpp		Easy
204	count-primes	Cpp		Easy
205	isomorphic-strings	Javascript Cpp		Easy
206	reverse-linked-list	Cpp	📝	Easy
207	course-schedule	Cpp		Medium
208	implement-trie-prefix-tree	Cpp	📝	Medium
209	minimum-size-subarray-sum	Cpp	📝	Medium
210	course-schedule-ii	Cpp		Medium
211	add-and-search-word-data-structure-design	Cpp		Medium
212	word-search-ii	Cpp		Hard
213	house-robber-ii	Cpp		Medium
214	shortest-palindrome	Cpp	📝	Hard
215	kth-largest-element-in-an-array	Cpp		Medium
216	combination-sum-iii	Cpp		Medium
217	contains-duplicate	Javascript Cpp	📝	Easy
218	the-skyline-problem	Cpp		Hard
219	contains-duplicate-ii	Javascript Cpp	📝	Easy
220	contains-duplicate-iii	Cpp	📝	Medium
221	maximal-square	Cpp	📝	Medium
222	count-complete-tree-nodes	Cpp		Medium
223	rectangle-area	Cpp		Medium
224	basic-calculator	Cpp		Hard
225	implement-stack-using-queues	Javascript	📝	Easy
226	invert-binary-tree		📝	Easy
227	basic-calculator-ii			Medium
228	summary-ranges		📝	Medium
229	majority-element-ii			Medium
230	kth-smallest-element-in-a-bst			Medium
231	power-of-two			Easy
232	implement-queue-using-stacks		📝	Easy
233	number-of-digit-one		📝	Hard
234	palindrome-linked-list			Easy
235	lowest-common-ancestor-of-a-binary-search-tree			Easy
236	lowest-common-ancestor-of-a-binary-tree			Medium
237	delete-node-in-a-linked-list		📝	Easy
238	product-of-array-except-self			Medium
239	sliding-window-maximum			Hard
240	search-a-2d-matrix-ii		📝	Medium
241	different-ways-to-add-parentheses			Medium
242	valid-anagram		📝	Easy
243	shortest-word-distance	🔒	📝	Easy
244	shortest-word-distance-ii	🔒		Medium
245	shortest-word-distance-iii	🔒		Medium
246	strobogrammatic-number	🔒		Easy
247	strobogrammatic-number-ii	🔒		Medium
248	strobogrammatic-number-iii	🔒		Hard
249	group-shifted-strings	🔒		Medium
250	count-univalue-subtrees	🔒		Medium
251	flatten-2d-vector	🔒		Medium
252	meeting-rooms	🔒	📝	Easy
253	meeting-rooms-ii	🔒	📝	Medium
254	factor-combinations	🔒		Medium
255	verify-preorder-sequence-in-binary-search-tree	🔒		Medium
256	paint-house	🔒		Easy
257	binary-tree-paths			Easy
258	add-digits			Easy
259	3sum-smaller	🔒	📝	Medium
260	single-number-iii			Medium
261	graph-valid-tree	🔒		Medium
263	ugly-number			Easy
264	ugly-number-ii			Medium
265	paint-house-ii	🔒		Hard
266	palindrome-permutation	🔒	📝	Easy
267	palindrome-permutation-ii	🔒	📝	Medium
268	missing-number		📝	Easy
269	alien-dictionary	🔒		Hard
270	closest-binary-search-tree-value	🔒		Easy
271	encode-and-decode-strings	🔒		Medium
272	closest-binary-search-tree-value-ii	🔒		Hard
273	integer-to-english-words			Hard
274	h-index		📝	Medium
275	h-index-ii			Medium
276	paint-fence	🔒		Easy
277	find-the-celebrity	🔒		Medium
278	first-bad-version		📝	Easy
279	perfect-squares			Medium
280	wiggle-sort	🔒	📝	Medium
281	zigzag-iterator	🔒		Medium
282	expression-add-operators		📝	Hard
283	move-zeroes		📝	Easy
284	peeking-iterator			Medium
285	inorder-successor-in-bst	🔒		Medium
286	walls-and-gates	🔒	📝	Medium
287	find-the-duplicate-number		📝	Medium
288	unique-word-abbreviation	🔒	📝	Medium
289	game-of-life			Medium
290	word-pattern			Easy
291	word-pattern-ii	🔒		Hard
292	nim-game		📝	Easy
293	flip-game	🔒		Easy
294	flip-game-ii	🔒		Medium
295	find-median-from-data-stream		📝	Hard
296	best-meeting-point	🔒	📝	Hard
297	serialize-and-deserialize-binary-tree			Hard
298	binary-tree-longest-consecutive-sequence	🔒	📝	Medium
299	bulls-and-cows			Medium
300	longest-increasing-subsequence		📝	Medium
301	remove-invalid-parentheses			Hard
302	smallest-rectangle-enclosing-black-pixels	🔒	📝	Hard
303	range-sum-query-immutable		📝	Easy
304	range-sum-query-2d-immutable		📝	Medium
305	number-of-islands-ii	🔒	📝	Hard
306	additive-number			Medium
307	range-sum-query-mutable		📝	Medium
308	range-sum-query-2d-mutable	🔒		Hard
309	best-time-to-buy-and-sell-stock-with-cooldown			Medium
310	minimum-height-trees			Medium
311	sparse-matrix-multiplication	🔒		Medium
312	burst-balloons			Hard
313	super-ugly-number			Medium
314	binary-tree-vertical-order-traversal	🔒		Medium
315	count-of-smaller-numbers-after-self			Hard
316	remove-duplicate-letters			Hard
317	shortest-distance-from-all-buildings	🔒		Hard
318	maximum-product-of-word-lengths			Medium
319	bulb-switcher			Medium
320	generalized-abbreviation	🔒	📝	Medium
321	create-maximum-number			Hard
322	coin-change		📝	Medium
323	number-of-connected-components-in-an-undirected-graph	🔒		Medium
324	wiggle-sort-ii			Medium
325	maximum-size-subarray-sum-equals-k	🔒		Medium
326	power-of-three		📝	Easy
327	count-of-range-sum			Hard
328	odd-even-linked-list		📝	Medium
329	longest-increasing-path-in-a-matrix		📝	Hard
330	patching-array		📝	Hard
331	verify-preorder-serialization-of-a-binary-tree			Medium
332	reconstruct-itinerary			Medium
333	largest-bst-subtree	🔒		Medium
334	increasing-triplet-subsequence			Medium
335	self-crossing			Hard
336	palindrome-pairs			Hard
337	house-robber-iii			Medium
338	counting-bits		📝	Medium
339	nested-list-weight-sum	🔒	📝	Easy
340	longest-substring-with-at-most-k-distinct-characters	🔒		Hard
341	flatten-nested-list-iterator			Medium
342	power-of-four			Easy
343	integer-break			Medium
344	reverse-string			Easy
345	reverse-vowels-of-a-string			Easy
346	moving-average-from-data-stream	🔒		Easy
347	top-k-frequent-elements			Medium
348	design-tic-tac-toe	🔒		Medium
349	intersection-of-two-arrays			Easy
350	intersection-of-two-arrays-ii			Easy
351	android-unlock-patterns	🔒	📝	Medium
352	data-stream-as-disjoint-intervals			Hard
353	design-snake-game	🔒		Medium
354	russian-doll-envelopes			Hard
355	design-twitter			Medium
356	line-reflection	🔒		Medium
357	count-numbers-with-unique-digits			Medium
358	rearrange-string-k-distance-apart	🔒		Hard
359	logger-rate-limiter	🔒		Easy
360	sort-transformed-array	🔒		Medium
361	bomb-enemy	🔒		Medium
362	design-hit-counter	🔒		Medium
363	max-sum-of-rectangle-no-larger-than-k			Hard
364	nested-list-weight-sum-ii	🔒		Medium
365	water-and-jug-problem			Medium
366	find-leaves-of-binary-tree	🔒		Medium
367	valid-perfect-square			Easy
368	largest-divisible-subset			Medium
369	plus-one-linked-list	🔒		Medium
370	range-addition	🔒	📝	Medium
371	sum-of-two-integers	Cpp		Easy
372	super-pow			Medium
373	find-k-pairs-with-smallest-sums			Medium
374	guess-number-higher-or-lower	Cpp	📝	Easy
375	guess-number-higher-or-lower-ii		📝	Medium
376	wiggle-subsequence		📝	Medium
377	combination-sum-iv			Medium
378	kth-smallest-element-in-a-sorted-matrix			Medium
379	design-phone-directory	🔒		Medium
380	insert-delete-getrandom-o1			Medium
381	insert-delete-getrandom-o1-duplicates-allowed			Hard
382	linked-list-random-node			Medium
383	ransom-note			Easy
384	shuffle-an-array		📝	Medium
385	mini-parser			Medium
386	lexicographical-numbers			Medium
387	first-unique-character-in-a-string			Easy
388	longest-absolute-file-path			Medium
389	find-the-difference			Easy
390	elimination-game			Medium
391	perfect-rectangle			Hard
392	is-subsequence			Medium
393	utf-8-validation			Medium
394	decode-string			Medium
395	longest-substring-with-at-least-k-repeating-characters			Medium
396	rotate-function			Medium
397	integer-replacement			Medium
398	random-pick-index			Medium
399	evaluate-division			Medium
400	nth-digit			Easy
401	binary-watch			Easy
402	remove-k-digits			Medium
403	frog-jump		📝	Hard
404	sum-of-left-leaves			Easy
405	convert-a-number-to-hexadecimal			Easy
406	queue-reconstruction-by-height			Medium
407	trapping-rain-water-ii			Hard
408	valid-word-abbreviation	🔒		Easy
409	longest-palindrome		📝	Easy
410	split-array-largest-sum		📝	Hard
411	minimum-unique-word-abbreviation	🔒		Hard
412	fizz-buzz			Easy
413	arithmetic-slices		📝	Medium
414	third-maximum-number			Easy
415	add-strings			Easy
416	partition-equal-subset-sum			Medium
417	pacific-atlantic-water-flow			Medium
418	sentence-screen-fitting	🔒		Medium
419	battleships-in-a-board			Medium
420	strong-password-checker			Hard
421	maximum-xor-of-two-numbers-in-an-array			Medium
422	valid-word-square	🔒		Easy
423	reconstruct-original-digits-from-english			Medium
424	longest-repeating-character-replacement			Medium
425	word-squares	🔒		Hard
432	all-oone-data-structure			Hard
433	minimum-genetic-mutation			Medium
434	number-of-segments-in-a-string		📝	Easy
435	non-overlapping-intervals		📝	Medium
436	find-right-interval		📝	Medium
437	path-sum-iii			Easy
438	find-all-anagrams-in-a-string			Easy
439	ternary-expression-parser	🔒		Medium
440	k-th-smallest-in-lexicographical-order			Hard
441	arranging-coins			Easy
442	find-all-duplicates-in-an-array			Medium
443	string-compression		📝	Easy
444	sequence-reconstruction	🔒		Medium
445	add-two-numbers-ii			Medium
446	arithmetic-slices-ii-subsequence		📝	Hard
447	number-of-boomerangs			Easy
448	find-all-numbers-disappeared-in-an-array			Easy
449	serialize-and-deserialize-bst			Medium
450	delete-node-in-a-bst			Medium
451	sort-characters-by-frequency			Medium
452	minimum-number-of-arrows-to-burst-balloons			Medium
453	minimum-moves-to-equal-array-elements		📝	Easy
454	4sum-ii			Medium
455	assign-cookies			Easy
456	132-pattern		📝	Medium
457	circular-array-loop			Medium
458	poor-pigs			Easy
459	repeated-substring-pattern			Easy
460	lfu-cache			Hard
461	hamming-distance			Easy
462	minimum-moves-to-equal-array-elements-ii		📝	Medium
463	island-perimeter			Easy
464	can-i-win			Medium
465	optimal-account-balancing	🔒		Hard
466	count-the-repetitions		📝	Hard
467	unique-substrings-in-wraparound-string			Medium
468	validate-ip-address			Medium
469	convex-polygon	🔒		Medium
471	encode-string-with-shortest-length	🔒		Hard
472	concatenated-words			Hard
473	matchsticks-to-square		📝	Medium
474	ones-and-zeroes		📝	Medium
475	heaters			Easy
476	number-complement			Easy
477	total-hamming-distance		📝	Medium
479	largest-palindrome-product			Easy
480	sliding-window-median		📝	Hard
481	magical-string			Medium
482	license-key-formatting			Easy
483	smallest-good-base			Hard
484	find-permutation	🔒	📝	Medium
485	max-consecutive-ones			Easy
486	predict-the-winner		📝	Medium
487	max-consecutive-ones-ii	🔒		Medium
488	zuma-game			Hard
490	the-maze	🔒	📝	Medium
491	increasing-subsequences			Medium
492	construct-the-rectangle			Easy
493	reverse-pairs		📝	Hard
494	target-sum		📝	Medium
495	teemo-attacking			Medium
496	next-greater-element-i		📝	Easy
498	diagonal-traverse			Medium
499	the-maze-iii	🔒		Hard
500	keyboard-row			Easy
501	find-mode-in-binary-search-tree			Easy
502	ipo			Hard
503	next-greater-element-ii		📝	Medium
504	base-7			Easy
505	the-maze-ii	🔒	📝	Medium
506	relative-ranks			Easy
507	perfect-number		📝	Easy
508	most-frequent-subtree-sum			Medium
513	find-bottom-left-tree-value			Medium
514	freedom-trail			Hard
515	find-largest-value-in-each-tree-row			Medium
516	longest-palindromic-subsequence			Medium
517	super-washing-machines			Hard
518	coin-change-2			Medium
520	detect-capital			Easy
521	longest-uncommon-subsequence-i		📝	Easy
522	longest-uncommon-subsequence-ii		📝	Medium
523	continuous-subarray-sum		📝	Medium
524	longest-word-in-dictionary-through-deleting		📝	Medium
525	contiguous-array		📝	Medium
526	beautiful-arrangement		📝	Medium
527	word-abbreviation	🔒	📝	Hard
529	minesweeper			Medium
530	minimum-absolute-difference-in-bst			Easy
531	lonely-pixel-i	🔒		Medium
532	k-diff-pairs-in-an-array			Easy
533	lonely-pixel-ii	🔒		Medium
535	encode-and-decode-tinyurl		📝	Medium
536	construct-binary-tree-from-string	🔒		Medium
537	complex-number-multiplication		📝	Medium
538	convert-bst-to-greater-tree		📝	Easy
539	minimum-time-difference			Medium
540	single-element-in-a-sorted-array			Medium
541	reverse-string-ii		📝	Easy
542	01-matrix		📝	Medium
543	diameter-of-binary-tree		📝	Easy
544	output-contest-matches	🔒	📝	Medium
545	boundary-of-binary-tree	🔒	📝	Medium
546	remove-boxes		📝	Hard
547	friend-circles		📝	Medium
548	split-array-with-equal-sum	🔒	📝	Medium
549	binary-tree-longest-consecutive-sequence-ii	🔒	📝	Medium
551	student-attendance-record-i		📝	Easy
552	student-attendance-record-ii		📝	Hard
553	optimal-division		📝	Medium
554	brick-wall		📝	Medium
555	split-concatenated-strings	🔒	📝	Medium
556	next-greater-element-iii		📝	Medium
557	reverse-words-in-a-string-iii		📝	Easy
560	subarray-sum-equals-k		📝	Medium
561	array-partition-i		📝	Easy
562	longest-line-of-consecutive-one-in-matrix	🔒	📝	Medium
563	binary-tree-tilt		📝	Easy
564	find-the-closest-palindrome		📝	Hard
565	array-nesting		📝	Medium
566	reshape-the-matrix		📝	Easy
567	permutation-in-string		📝	Medium
568	maximum-vacation-days	🔒	📝	Hard
572	subtree-of-another-tree		📝	Easy
573	squirrel-simulation	🔒	📝	Medium
575	distribute-candies		📝	Easy
576	out-of-boundary-paths		📝	Medium
581	shortest-unsorted-continuous-subarray		📝	Easy
582	kill-process	🔒	📝	Medium
583	delete-operation-for-two-strings		📝	Medium
587	erect-the-fence		📝	Hard
588	design-in-memory-file-system	🔒	📝	Hard
591	tag-validator		📝	Hard
592	fraction-addition-and-subtraction		📝	Medium
593	valid-square		📝	Medium
594	longest-harmonious-subsequence		📝	Easy
598	range-addition-ii		📝	Easy
599	minimum-index-sum-of-two-lists		📝	Easy
600	non-negative-integers-without-consecutive-ones		📝	Hard
604	design-compressed-string-iterator	🔒	📝	Easy
605	can-place-flowers		📝	Easy
606	construct-string-from-binary-tree		📝	Easy
609	find-duplicate-file-in-system		📝	Medium
611	valid-triangle-number		📝	Medium
616	add-bold-tag-in-string	🔒	📝	Medium
617	merge-two-binary-trees		📝	Easy
621	task-scheduler		📝	Medium
623	add-one-row-to-tree		📝	Medium
624	maximum-distance-in-arrays	🔒	📝	Easy
625	minimum-factorization	🔒	📝	Medium
628	maximum-product-of-three-numbers		📝	Easy
629	k-inverse-pairs-array		📝	Hard
630	course-schedule-iii		📝	Hard
631	design-excel-sum-formula	🔒	📝	Hard
632	smallest-range		📝	Hard
633	sum-of-square-numbers		📝	Easy
634	find-the-derangement-of-an-array	🔒	📝	Medium
635	design-log-storage-system	🔒	📝	Medium
636	exclusive-time-of-functions		📝	Medium
637	average-of-levels-in-binary-tree		📝	Easy
638	shopping-offers		📝	Medium
639	decode-ways-ii		📝	Hard
640	solve-the-equation		📝	Medium
642	design-search-autocomplete-system	🔒	📝	Hard
643	maximum-average-subarray-i		📝	Easy
644	maximum-average-subarray-ii	🔒	📝	Hard
645	set-mismatch		📝	Easy
646	maximum-length-of-pair-chain		📝	Medium
647	palindromic-substrings		📝	Medium
648	replace-words		📝	Medium
649	dota2-senate		📝	Medium
650	2-keys-keyboard		📝	Medium
651	4-keys-keyboard	🔒	📝	Medium
652	find-duplicate-subtrees		📝	Medium
653	two-sum-iv-input-is-a-bst		📝	Easy
654	maximum-binary-tree		📝	Medium
655	print-binary-tree		📝	Medium
656	coin-path	🔒	📝	Hard
657	robot-return-to-origin		📝	Easy
658	find-k-closest-elements		📝	Medium
659	split-array-into-consecutive-subsequences		📝	Medium
660	remove-9	🔒	📝	Hard
661	image-smoother		📝	Easy
662	maximum-width-of-binary-tree		📝	Medium
663	equal-tree-partition	🔒	📝	Medium
664	strange-printer		📝	Hard
665	non-decreasing-array		📝	Easy
666	path-sum-iv	🔒	📝	Medium
667	beautiful-arrangement-ii		📝	Medium
668	kth-smallest-number-in-multiplication-table		📝	Hard
669	trim-a-binary-search-tree		📝	Easy
670	maximum-swap		📝	Medium
671	second-minimum-node-in-a-binary-tree		📝	Easy
672	bulb-switcher-ii		📝	Medium
673	number-of-longest-increasing-subsequence		📝	Medium
674	longest-continuous-increasing-subsequence		📝	Easy
675	cut-off-trees-for-golf-event		📝	Hard
676	implement-magic-dictionary		📝	Medium
677	map-sum-pairs		📝	Medium
678	valid-parenthesis-string		📝	Medium
679	24-game		📝	Hard
680	valid-palindrome-ii		📝	Easy
681	next-closest-time	🔒	📝	Medium
682	baseball-game		📝	Easy
683	k-empty-slots	🔒	📝	Hard
684	redundant-connection		📝	Medium
685	redundant-connection-ii		📝	Hard
686	repeated-string-match		📝	Easy
687	longest-univalue-path		📝	Easy
688	knight-probability-in-chessboard		📝	Medium
689	maximum-sum-of-3-non-overlapping-subarrays		📝	Hard
690	employee-importance		📝	Easy
691	stickers-to-spell-word		📝	Hard
692	top-k-frequent-words		📝	Medium
693	binary-number-with-alternating-bits		📝	Easy
694	number-of-distinct-islands	🔒	📝	Medium
695	max-area-of-island		📝	Easy
696	count-binary-substrings		📝	Easy
697	degree-of-an-array		📝	Easy
698	partition-to-k-equal-sum-subsets		📝	Medium
699	falling-squares		📝	Hard
711	number-of-distinct-islands-ii	🔒	📝	Hard
712	minimum-ascii-delete-sum-for-two-strings		📝	Medium
713	subarray-product-less-than-k		📝	Medium
714	best-time-to-buy-and-sell-stock-with-transaction-fee		📝	Medium
715	range-module		📝	Hard
716	max-stack	🔒	📝	Hard
717	1-bit-and-2-bit-characters		📝	Easy
718	maximum-length-of-repeated-subarray		📝	Medium
719	find-k-th-smallest-pair-distance		📝	Hard
720	longest-word-in-dictionary		📝	Easy
721	accounts-merge		📝	Medium
722	remove-comments		📝	Medium
723	candy-crush	🔒	📝	Medium
724	find-pivot-index		📝	Easy
725	split-linked-list-in-parts		📝	Medium
726	number-of-atoms		📝	Hard
727	minimum-window-subsequence	🔒	📝	Hard
728	self-dividing-numbers		📝	Easy
729	my-calendar-i		📝	Medium
730	count-different-palindromic-subsequences		📝	Hard
731	my-calendar-ii		📝	Medium
732	my-calendar-iii		📝	Hard
733	flood-fill		📝	Easy
734	sentence-similarity	🔒	📝	Easy
735	asteroid-collision		📝	Medium
736	parse-lisp-expression		📝	Hard
737	sentence-similarity-ii	🔒	📝	Medium
738	monotone-increasing-digits		📝	Medium
739	daily-temperatures		📝	Medium
740	delete-and-earn		📝	Medium
741	cherry-pickup		📝	Hard
742	to-lower-case			Easy
743	closest-leaf-in-a-binary-tree	🔒	📝	Medium
744	network-delay-time		📝	Medium
745	find-smallest-letter-greater-than-target		📝	Easy
746	prefix-and-suffix-search		📝	Hard
747	min-cost-climbing-stairs		📝	Easy
748	largest-number-at-least-twice-of-others		📝	Easy
749	shortest-completing-word		📝	Medium
750	contain-virus		📝	Hard
751	number-of-corner-rectangles	🔒	📝	Medium
752	ip-to-cidr	🔒	📝	Easy
753	open-the-lock		📝	Medium
754	cracking-the-safe		📝	Hard
755	reach-a-number		📝	Medium
756	pour-water	🔒	📝	Medium
757	pyramid-transition-matrix		📝	Medium
758	convert-binary-search-tree-to-sorted-doubly-linked-list	🔒		Medium
759	set-intersection-size-at-least-two		📝	Hard
760	bold-words-in-string	🔒	📝	Easy
761	employee-free-time	🔒	📝	Hard
762	find-anagram-mappings	🔒	📝	Easy
763	special-binary-string		📝	Hard
764	n-ary-tree-level-order-traversal			Easy
765	serialize-and-deserialize-n-ary-tree	🔒		Hard
766	flatten-a-multilevel-doubly-linked-list			Medium
767	prime-number-of-set-bits-in-binary-representation		📝	Easy
768	partition-labels		📝	Medium
769	largest-plus-sign		📝	Medium
770	couples-holding-hands		📝	Hard
771	encode-n-ary-tree-to-binary-tree	🔒		Hard
772	construct-quad-tree			Easy
773	quad-tree-intersection			Easy
774	maximum-depth-of-n-ary-tree			Easy
775	n-ary-tree-preorder-traversal			Easy
776	n-ary-tree-postorder-traversal			Easy
777	toeplitz-matrix		📝	Easy
778	reorganize-string		📝	Medium
779	max-chunks-to-make-sorted-ii		📝	Hard
780	max-chunks-to-make-sorted		📝	Medium
781	basic-calculator-iv		📝	Hard
782	jewels-and-stones		📝	Easy
783	search-in-a-binary-search-tree			Easy
784	insert-into-a-binary-search-tree			Medium
785	basic-calculator-iii	🔒		Hard
786	search-in-a-sorted-array-of-unknown-size	🔒		Medium
787	sliding-puzzle		📝	Hard
788	minimize-max-distance-to-gas-station	🔒	📝	Hard
789	kth-largest-element-in-a-stream			Easy
790	global-and-local-inversions		📝	Medium
791	split-bst	🔒	📝	Medium
792	binary-search			Easy
793	swap-adjacent-in-lr-string		📝	Medium
794	swim-in-rising-water		📝	Hard
795	k-th-symbol-in-grammar		📝	Medium
796	reaching-points		📝	Hard
797	rabbits-in-forest		📝	Medium
798	transform-to-chessboard		📝	Hard
799	minimum-distance-between-bst-nodes		📝	Easy
800	letter-case-permutation		📝	Easy
801	is-graph-bipartite		📝	Medium
802	k-th-smallest-prime-fraction		📝	Hard
803	cheapest-flights-within-k-stops		📝	Medium
804	rotated-digits		📝	Easy
805	escape-the-ghosts		📝	Medium
806	domino-and-tromino-tiling		📝	Medium
807	custom-sort-string		📝	Medium
808	number-of-matching-subsequences		📝	Medium
809	preimage-size-of-factorial-zeroes-function		📝	Hard
810	valid-tic-tac-toe-state		📝	Medium
811	number-of-subarrays-with-bounded-maximum		📝	Medium
812	rotate-string		📝	Easy
813	all-paths-from-source-to-target		📝	Medium
814	smallest-rotation-with-highest-score		📝	Hard
815	champagne-tower		📝	Medium
816	design-hashset			Easy
817	design-hashmap			Easy
818	similar-rgb-color	🔒	📝	Easy
819	minimum-swaps-to-make-sequences-increasing		📝	Medium
820	find-eventual-safe-states		📝	Medium
821	bricks-falling-when-hit		📝	Hard
822	unique-morse-code-words		📝	Easy
823	split-array-with-same-average		📝	Hard
824	number-of-lines-to-write-string		📝	Easy
825	max-increase-to-keep-city-skyline		📝	Medium
826	soup-servings		📝	Medium
827	expressive-words		📝	Medium
828	chalkboard-xor-game		📝	Hard
829	subdomain-visit-count		📝	Easy
830	largest-triangle-area		📝	Easy
831	largest-sum-of-averages		📝	Medium
832	binary-tree-pruning		📝	Medium
833	bus-routes		📝	Hard
834	ambiguous-coordinates		📝	Medium
835	linked-list-components		📝	Medium
836	race-car		📝	Hard
837	most-common-word		📝	Easy
838	design-linked-list			Easy
839	short-encoding-of-words		📝	Medium
841	shortest-distance-to-a-character		📝	Easy
842	card-flipping-game		📝	Medium
843	binary-trees-with-factors		📝	Medium
850	insert-into-a-cyclic-sorted-list	🔒		Medium
851	goat-latin		📝	Easy
852	friends-of-appropriate-ages		📝	Medium
853	most-profit-assigning-work		📝	Medium
854	making-a-large-island		📝	Hard
855	unique-letter-string		📝	Hard
856	consecutive-numbers-sum		📝	Medium
857	positions-of-large-groups		📝	Easy
858	masking-personal-information		📝	Medium
859	design-circular-deque			Medium
860	design-circular-queue			Medium
861	flipping-an-image		📝	Easy
862	find-and-replace-in-string		📝	Medium
863	sum-of-distances-in-tree		📝	Hard
864	image-overlap		📝	Medium
865	robot-room-cleaner	🔒		Hard
866	rectangle-overlap		📝	Easy
867	new-21-game		📝	Medium
868	push-dominoes		📝	Medium
869	similar-string-groups		📝	Hard
870	magic-squares-in-grid		📝	Easy
871	keys-and-rooms		📝	Medium
872	split-array-into-fibonacci-sequence		📝	Medium
873	guess-the-word		📝	Hard
874	backspace-string-compare		📝	Easy
875	longest-mountain-in-array		📝	Medium
876	hand-of-straights		📝	Medium
877	shortest-path-visiting-all-nodes		📝	Hard
878	shifting-letters		📝	Medium
879	maximize-distance-to-closest-person		📝	Easy
880	rectangle-area-ii		📝	Hard
881	loud-and-rich		📝	Medium
882	peak-index-in-a-mountain-array		📝	Easy
883	car-fleet		📝	Medium
884	k-similar-strings		📝	Hard
885	exam-room		📝	Medium
886	score-of-parentheses		📝	Medium
887	minimum-cost-to-hire-k-workers		📝	Hard
888	mirror-reflection		📝	Medium
889	buddy-strings		📝	Easy
890	lemonade-change		📝	Easy
891	score-after-flipping-matrix		📝	Medium
892	shortest-subarray-with-sum-at-least-k		📝	Hard
893	all-nodes-distance-k-in-binary-tree		📝	Medium
894	random-pick-with-blacklist		📝	Hard
895	shortest-path-to-get-all-keys		📝	Hard
896	smallest-subtree-with-all-the-deepest-nodes		📝	Medium
897	prime-palindrome		📝	Medium
898	transpose-matrix		📝	Easy
899	binary-gap		📝	Easy
900	reordered-power-of-2		📝	Medium
901	advantage-shuffle		📝	Medium
902	minimum-number-of-refueling-stops		📝	Hard
903	implement-rand10-using-rand7		📝	Medium
904	leaf-similar-trees		📝	Easy
905	length-of-longest-fibonacci-subsequence		📝	Medium
906	walking-robot-simulation		📝	Easy
907	koko-eating-bananas		📝	Medium
908	middle-of-the-linked-list		📝	Easy
909	stone-game		📝	Medium
910	nth-magical-number		📝	Hard
911	profitable-schemes		📝	Hard
912	random-pick-with-weight		📝	Medium
913	random-flip-matrix		📝	Medium
914	random-point-in-non-overlapping-rectangles		📝	Medium
915	generate-random-point-in-a-circle		📝	Medium
916	decoded-string-at-index		📝	Medium
917	boats-to-save-people		📝	Medium
918	reachable-nodes-in-subdivided-graph		📝	Hard
919	projection-area-of-3d-shapes		📝	Easy
920	uncommon-words-from-two-sentences		📝	Easy
921	spiral-matrix-iii		📝	Medium
922	possible-bipartition		📝	Medium
923	super-egg-drop		📝	Hard
924	fair-candy-swap		📝	Easy
925	construct-binary-tree-from-preorder-and-postorder-traversal		📝	Medium
926	find-and-replace-pattern		📝	Medium
927	sum-of-subsequence-widths		📝	Hard
928	surface-area-of-3d-shapes		📝	Easy
929	groups-of-special-equivalent-strings		📝	Easy
930	all-possible-full-binary-trees		📝	Medium
931	maximum-frequency-stack		📝	Hard
932	monotonic-array		📝	Easy
933	increasing-order-search-tree		📝	Easy
934	bitwise-ors-of-subarrays		📝	Medium
935	orderly-queue		📝	Hard
936	rle-iterator		📝	Medium
937	online-stock-span		📝	Medium
938	numbers-at-most-n-given-digit-set		📝	Hard
939	valid-permutations-for-di-sequence		📝	Hard

xzlin / leetcode Goto Github PK

leetcode's Introduction

✏️ Leetcode Solutions with Cpp,Javascript,Python

leetcode's People

Contributors

Watchers

Recommend Projects

React

Vue.js

Typescript

TensorFlow

Django

Laravel

D3

Recommend Topics

javascript

web

server

Machine learning

Visualization

Game

Recommend Org

Facebook

Microsoft

Google

Alibaba

D3

Tencent