✏️ Leetcode Solutions with Javascript

Update time: 2019-09-24 16:10:51

Auto created by leetcode_generate

I have solved 52 / 1116 problems while there are 186 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		📝	Medium
4	median-of-two-sorted-arrays		📝	Hard
5	longest-palindromic-substring		📝	Medium
6	zigzag-conversion		📝	Medium
7	reverse-integer	Javascript	📝	Easy
8	string-to-integer-atoi			Medium
9	palindrome-number	Javascript	📝	Easy
10	regular-expression-matching		📝	Hard
11	container-with-most-water	Javascript	📝	Medium
12	integer-to-roman			Medium
13	roman-to-integer	Javascript		Easy
14	longest-common-prefix	Javascript	📝	Easy
15	3sum			Medium
16	3sum-closest			Medium
17	letter-combinations-of-a-phone-number		📝	Medium
18	4sum			Medium
19	remove-nth-node-from-end-of-list		📝	Medium
20	valid-parentheses	Javascript	📝	Easy
21	merge-two-sorted-lists	Javascript	📝	Easy
22	generate-parentheses	Javascript	📝	Medium
23	merge-k-sorted-lists		📝	Hard
24	swap-nodes-in-pairs			Medium
25	reverse-nodes-in-k-group			Hard
26	remove-duplicates-from-sorted-array	Javascript	📝	Easy
27	remove-element	Javascript	📝	Easy
28	implement-strstr	Javascript		Easy
29	divide-two-integers			Medium
30	substring-with-concatenation-of-all-words			Hard
31	next-permutation		📝	Medium
32	longest-valid-parentheses		📝	Hard
33	search-in-rotated-sorted-array		📝	Medium
34	find-first-and-last-position-of-element-in-sorted-array		📝	Medium
35	search-insert-position	Javascript		Easy
36	valid-sudoku	Javascript	📝	Medium
37	sudoku-solver		📝	Hard
38	count-and-say	Javascript		Easy
39	combination-sum			Medium
40	combination-sum-ii			Medium
41	first-missing-positive		📝	Hard
42	trapping-rain-water		📝	Hard
43	multiply-strings			Medium
44	wildcard-matching		📝	Hard
45	jump-game-ii			Hard
46	permutations		📝	Medium
47	permutations-ii			Medium
48	rotate-image		📝	Medium
49	group-anagrams		📝	Medium
50	powx-n		📝	Medium
51	n-queens		📝	Hard
52	n-queens-ii		📝	Hard
53	maximum-subarray	Javascript	📝	Easy
54	spiral-matrix		📝	Medium
55	jump-game		📝	Medium
56	merge-intervals		📝	Medium
57	insert-interval		📝	Hard
58	length-of-last-word	Javascript		Easy
59	spiral-matrix-ii			Medium
60	permutation-sequence			Medium
61	rotate-list		📝	Medium
62	unique-paths			Medium
63	unique-paths-ii		📝	Medium
64	minimum-path-sum		📝	Medium
65	valid-number			Hard
66	plus-one	Javascript		Easy
67	add-binary			Easy
68	text-justification			Hard
69	sqrtx	Javascript	📝	Easy
70	climbing-stairs	Javascript	📝	Easy
71	simplify-path			Medium
72	edit-distance		📝	Hard
73	set-matrix-zeroes		📝	Medium
74	search-a-2d-matrix		📝	Medium
75	sort-colors		📝	Medium
76	minimum-window-substring		📝	Hard
77	combinations		📝	Medium
78	subsets			Medium
79	word-search			Medium
80	remove-duplicates-from-sorted-array-ii			Medium
81	search-in-rotated-sorted-array-ii			Medium
82	remove-duplicates-from-sorted-list-ii			Medium
83	remove-duplicates-from-sorted-list		📝	Easy
84	largest-rectangle-in-histogram		📝	Hard
85	maximal-rectangle		📝	Hard
86	partition-list		📝	Medium
87	scramble-string			Hard
88	merge-sorted-array		📝	Easy
89	gray-code			Medium
90	subsets-ii			Medium
91	decode-ways			Medium
92	reverse-linked-list-ii		📝	Medium
93	restore-ip-addresses		📝	Medium
94	binary-tree-inorder-traversal		📝	Medium
95	unique-binary-search-trees-ii		📝	Medium
96	unique-binary-search-trees		📝	Medium
97	interleaving-string		📝	Hard
98	validate-binary-search-tree		📝	Medium
99	recover-binary-search-tree		📝	Hard
100	same-tree		📝	Easy
101	symmetric-tree	Javascript	📝	Easy
102	binary-tree-level-order-traversal		📝	Medium
103	binary-tree-zigzag-level-order-traversal			Medium
104	maximum-depth-of-binary-tree	Javascript	📝	Easy
105	construct-binary-tree-from-preorder-and-inorder-traversal		📝	Medium
106	construct-binary-tree-from-inorder-and-postorder-traversal		📝	Medium
107	binary-tree-level-order-traversal-ii			Easy
108	convert-sorted-array-to-binary-search-tree			Easy
109	convert-sorted-list-to-binary-search-tree		📝	Medium
110	balanced-binary-tree			Easy
111	minimum-depth-of-binary-tree		📝	Easy
112	path-sum		📝	Easy
113	path-sum-ii			Medium
114	flatten-binary-tree-to-linked-list			Medium
115	distinct-subsequences			Hard
116	populating-next-right-pointers-in-each-node			Medium
117	populating-next-right-pointers-in-each-node-ii			Medium
118	pascals-triangle		📝	Easy
119	pascals-triangle-ii			Easy
120	triangle			Medium
121	best-time-to-buy-and-sell-stock	Javascript	📝	Easy
122	best-time-to-buy-and-sell-stock-ii		📝	Easy
123	best-time-to-buy-and-sell-stock-iii			Hard
124	binary-tree-maximum-path-sum		📝	Hard
125	valid-palindrome			Easy
126	word-ladder-ii			Hard
127	word-ladder		📝	Medium
128	longest-consecutive-sequence		📝	Hard
129	sum-root-to-leaf-numbers			Medium
130	surrounded-regions			Medium
131	palindrome-partitioning			Medium
132	palindrome-partitioning-ii			Hard
133	clone-graph			Medium
134	gas-station		📝	Medium
135	candy		📝	Hard
136	single-number	Javascript	📝	Easy
137	single-number-ii		📝	Medium
138	copy-list-with-random-pointer		📝	Medium
139	word-break		📝	Medium
140	word-break-ii		📝	Hard
141	linked-list-cycle	Javascript	📝	Easy
142	linked-list-cycle-ii		📝	Medium
143	reorder-list			Medium
144	binary-tree-preorder-traversal		📝	Medium
145	binary-tree-postorder-traversal		📝	Hard
146	lru-cache		📝	Medium
147	insertion-sort-list			Medium
148	sort-list			Medium
149	max-points-on-a-line		📝	Hard
150	evaluate-reverse-polish-notation			Medium
151	reverse-words-in-a-string			Medium
152	maximum-product-subarray			Medium
153	find-minimum-in-rotated-sorted-array		📝	Medium
154	find-minimum-in-rotated-sorted-array-ii			Hard
155	min-stack	Javascript		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	Javascript	📝	Easy
161	one-edit-distance	🔒	📝	Medium
162	find-peak-element		📝	Medium
163	missing-ranges	🔒		Medium
164	maximum-gap		📝	Hard
165	compare-version-numbers			Medium
166	fraction-to-recurring-decimal		📝	Medium
167	two-sum-ii-input-array-is-sorted		📝	Easy
168	excel-sheet-column-title			Easy
169	majority-element	Javascript	📝	Easy
170	two-sum-iii-data-structure-design	🔒		Easy
171	excel-sheet-column-number			Easy
172	factorial-trailing-zeroes			Easy
173	binary-search-tree-iterator		📝	Medium
174	dungeon-game			Hard
179	largest-number		📝	Medium
186	reverse-words-in-a-string-ii	🔒		Medium
187	repeated-dna-sequences		📝	Medium
188	best-time-to-buy-and-sell-stock-iv			Hard
189	rotate-array	Javascript	📝	Easy
190	reverse-bits			Easy
191	number-of-1-bits		📝	Easy
198	house-robber	Javascript	📝	Easy
199	binary-tree-right-side-view		📝	Medium
200	number-of-islands		📝	Medium
201	bitwise-and-of-numbers-range			Medium
202	happy-number			Easy
203	remove-linked-list-elements			Easy
204	count-primes	Javascript		Easy
205	isomorphic-strings			Easy
206	reverse-linked-list	Javascript	📝	Easy
207	course-schedule			Medium
208	implement-trie-prefix-tree		📝	Medium
209	minimum-size-subarray-sum		📝	Medium
210	course-schedule-ii		📝	Medium
211	add-and-search-word-data-structure-design			Medium
212	word-search-ii		📝	Hard
213	house-robber-ii			Medium
214	shortest-palindrome		📝	Hard
215	kth-largest-element-in-an-array		📝	Medium
216	combination-sum-iii			Medium
217	contains-duplicate	Javascript	📝	Easy
218	the-skyline-problem		📝	Hard
219	contains-duplicate-ii		📝	Easy
220	contains-duplicate-iii		📝	Medium
221	maximal-square	Javascript	📝	Medium
222	count-complete-tree-nodes		📝	Medium
223	rectangle-area			Medium
224	basic-calculator		📝	Hard
225	implement-stack-using-queues		📝	Easy
226	invert-binary-tree	Javascript	📝	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	Javascript		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	Javascript	📝	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			Easy
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	Javascript	📝	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	Javascript		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	Javascript		Easy
372	super-pow			Medium
373	find-k-pairs-with-smallest-sums			Medium
374	guess-number-higher-or-lower		📝	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	Javascript	📝	Easy
388	longest-absolute-file-path			Medium
389	find-the-difference			Easy
390	elimination-game			Medium
391	perfect-rectangle			Hard
392	is-subsequence			Easy
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			Medium
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	Javascript	📝	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	Javascript		Easy
438	find-all-anagrams-in-a-string	Javascript		Medium
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	Javascript		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		📝	Hard
459	repeated-substring-pattern			Easy
460	lfu-cache			Hard
461	hamming-distance	Javascript		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			Hard
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
509	inorder-successor-in-bst-ii	🔒	📝	Medium
511	all-paths-from-source-lead-to-destination	🔒		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	Javascript	📝	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	Javascript	📝	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	Javascript	📝	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	Javascript	📝	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-covering-elements-from-k-lists		📝	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		📝	Medium
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	🔒	📝	Easy
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	Javascript	📝	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		📝	Easy
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		📝	Easy
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			Medium
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		📝	Hard
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
940	fruit-into-baskets		📝	Medium
941	sort-array-by-parity		📝	Easy
942	super-palindromes		📝	Hard
943	sum-of-subarray-minimums		📝	Medium
944	smallest-range-i		📝	Easy
945	snakes-and-ladders		📝	Medium
946	smallest-range-ii		📝	Medium
947	online-election		📝	Medium
948	sort-an-array			Medium
949	cat-and-mouse		📝	Hard
950	x-of-a-kind-in-a-deck-of-cards		📝	Easy
951	partition-array-into-disjoint-intervals		📝	Medium
952	word-subsets		📝	Medium
953	reverse-only-letters		📝	Easy
954	maximum-sum-circular-subarray		📝	Medium
955	complete-binary-tree-inserter		📝	Medium
956	number-of-music-playlists		📝	Hard
957	minimum-add-to-make-parentheses-valid		📝	Medium
958	sort-array-by-parity-ii		📝	Easy
959	3sum-with-multiplicity		📝	Medium
960	minimize-malware-spread		📝	Hard
961	long-pressed-name		📝	Easy
962	flip-string-to-monotone-increasing		📝	Medium
963	three-equal-parts		📝	Hard
964	minimize-malware-spread-ii		📝	Hard
965	unique-email-addresses		📝	Easy
966	binary-subarrays-with-sum		📝	Medium
967	minimum-falling-path-sum		📝	Medium
968	beautiful-array		📝	Medium
969	number-of-recent-calls		📝	Easy
971	shortest-bridge		📝	Medium
972	knight-dialer		📝	Medium
973	stamping-the-sequence		📝	Hard
974	reorder-data-in-log-files		📝	Easy
975	range-sum-of-bst		📝	Easy
976	minimum-area-rectangle		📝	Medium
977	distinct-subsequences-ii		📝	Hard
978	valid-mountain-array		📝	Easy
979	di-string-match		📝	Easy
980	find-the-shortest-superstring		📝	Hard
981	delete-columns-to-make-sorted		📝	Easy
982	minimum-increment-to-make-array-unique		📝	Medium
983	validate-stack-sequences		📝	Medium
984	most-stones-removed-with-same-row-or-column		📝	Medium
985	bag-of-tokens		📝	Medium
986	largest-time-for-given-digits		📝	Easy
987	reveal-cards-in-increasing-order		📝	Medium
988	flip-equivalent-binary-trees		📝	Medium
989	largest-component-size-by-common-factor		📝	Hard
990	verifying-an-alien-dictionary		📝	Easy
991	array-of-doubled-pairs		📝	Medium
992	delete-columns-to-make-sorted-ii		📝	Medium
993	tallest-billboard		📝	Hard
994	prison-cells-after-n-days		📝	Medium
998	check-completeness-of-a-binary-tree		📝	Medium
999	regions-cut-by-slashes		📝	Medium
1000	delete-columns-to-make-sorted-iii		📝	Hard
1001	n-repeated-element-in-size-2n-array		📝	Easy
1002	maximum-width-ramp		📝	Medium
1003	minimum-area-rectangle-ii		📝	Medium
1004	least-operators-to-express-number		📝	Hard
1005	univalued-binary-tree		📝	Easy
1006	vowel-spellchecker		📝	Medium
1007	numbers-with-same-consecutive-differences		📝	Medium
1008	binary-tree-cameras		📝	Hard
1009	pancake-sorting		📝	Medium
1010	powerful-integers		📝	Easy
1011	flip-binary-tree-to-match-preorder-traversal		📝	Medium
1012	equal-rational-numbers		📝	Hard
1013	fibonacci-number		📝	Easy
1014	k-closest-points-to-origin		📝	Medium
1016	subarray-sums-divisible-by-k		📝	Medium
1017	odd-even-jump		📝	Hard
1018	largest-perimeter-triangle		📝	Easy
1019	squares-of-a-sorted-array		📝	Easy
1020	longest-turbulent-subarray		📝	Medium
1021	distribute-coins-in-binary-tree		📝	Medium
1022	unique-paths-iii		📝	Hard
1023	time-based-key-value-store		📝	Medium
1024	triples-with-bitwise-and-equal-to-zero			Hard
1025	minimum-cost-for-tickets		📝	Medium
1026	string-without-aaa-or-bbb		📝	Medium
1027	sum-of-even-numbers-after-queries		📝	Easy
1028	interval-list-intersections		📝	Medium
1029	vertical-order-traversal-of-a-binary-tree		📝	Medium
1030	smallest-string-starting-from-leaf		📝	Medium
1031	add-to-array-form-of-integer		📝	Easy
1032	satisfiability-of-equality-equations		📝	Medium
1033	broken-calculator		📝	Medium
1034	subarrays-with-k-different-integers		📝	Hard
1035	cousins-in-binary-tree		📝	Easy
1036	rotting-oranges		📝	Easy
1037	minimum-number-of-k-consecutive-bit-flips		📝	Hard
1038	number-of-squareful-arrays		📝	Hard
1039	find-the-town-judge			Easy
1040	maximum-binary-tree-ii			Medium
1041	available-captures-for-rook			Easy
1042	minimum-cost-to-merge-stones			Hard
1043	grid-illumination			Hard
1044	find-common-characters			Easy
1045	check-if-word-is-valid-after-substitutions			Medium
1046	max-consecutive-ones-iii			Medium
1047	maximize-sum-of-array-after-k-negations			Easy
1048	clumsy-factorial			Medium
1049	minimum-domino-rotations-for-equal-row		📝	Medium
1050	construct-binary-search-tree-from-preorder-traversal		📝	Medium
1051	shortest-way-to-form-string	🔒		Medium
1052	campus-bikes	🔒		Medium
1053	minimize-rounding-error-to-meet-target	🔒		Medium
1054	complement-of-base-10-integer			Easy
1055	pairs-of-songs-with-total-durations-divisible-by-60			Easy
1056	capacity-to-ship-packages-within-d-days			Medium
1057	numbers-with-repeated-digits			Hard
1058	lexicographically-smallest-equivalent-string	🔒		Medium
1059	missing-element-in-sorted-array	🔒	📝	Medium
1060	longest-repeating-substring	🔒	📝	Medium
1061	number-of-valid-subarrays	🔒		Hard
1062	partition-array-into-three-parts-with-equal-sum			Easy
1063	best-sightseeing-pair			Medium
1064	smallest-integer-divisible-by-k			Medium
1065	binary-string-with-substrings-representing-1-to-n			Medium
1066	fixed-point	🔒		Easy
1067	campus-bikes-ii	🔒		Medium
1068	digit-count-in-range	🔒		Hard
1069	confusing-number	🔒		Easy
1070	convert-to-base-2			Medium
1071	binary-prefix-divisible-by-5			Easy
1072	next-greater-node-in-linked-list			Medium
1073	number-of-enclaves			Medium
1074	high-five	🔒		Easy
1075	index-pairs-of-a-string	🔒		Easy
1076	brace-expansion	🔒		Medium
1077	confusing-number-ii	🔒		Hard
1078	remove-outermost-parentheses			Easy
1079	sum-of-root-to-leaf-binary-numbers			Easy
1080	camelcase-matching			Medium
1081	video-stitching			Medium
1082	sum-of-digits-in-the-minimum-number	🔒		Easy
1083	two-sum-less-than-k	🔒		Easy
1084	find-k-length-substrings-with-no-repeated-characters	🔒		Medium
1085	the-earliest-moment-when-everyone-become-friends	🔒		Medium
1086	divisor-game			Easy
1087	longest-arithmetic-sequence			Medium
1088	number-of-days-in-a-month	🔒		Easy
1089	remove-vowels-from-a-string	🔒		Easy
1090	armstrong-number	🔒		Easy
1091	maximum-average-subtree	🔒		Medium
1092	maximum-difference-between-node-and-ancestor			Medium
1093	recover-a-tree-from-preorder-traversal			Hard
1094	matrix-cells-in-distance-order			Easy
1095	two-city-scheduling		📝	Easy
1096	maximum-sum-of-two-non-overlapping-subarrays			Medium
1097	stream-of-characters			Hard
1098	largest-unique-number	🔒		Easy
1099	path-with-maximum-minimum-value	🔒		Medium
1100	connecting-cities-with-minimum-cost	🔒		Medium
1101	parallel-courses	🔒		Hard
1102	check-if-a-number-is-majority-element-in-a-sorted-array	🔒		Easy
1103	moving-stones-until-consecutive			Easy
1104	coloring-a-border			Medium
1105	uncrossed-lines			Medium
1106	escape-a-large-maze			Hard
1107	minimum-swaps-to-group-all-1s-together	🔒		Medium
1108	analyze-user-website-visit-pattern	🔒		Medium
1111	minimum-score-triangulation-of-polygon			Medium
1112	find-words-that-can-be-formed-by-characters			Easy
1113	moving-stones-until-consecutive-ii			Medium
1114	binary-search-tree-to-greater-sum-tree			Medium
1115	valid-boomerang			Easy
1116	maximum-level-sum-of-a-binary-tree		📝	Medium
1117	as-far-from-land-as-possible			Medium
1118	divide-array-into-increasing-sequences	🔒		Hard
1119	robot-bounded-in-circle			Medium
1120	flower-planting-with-no-adjacent			Easy
1121	partition-array-for-maximum-sum			Medium
1122	longest-duplicate-substring		📝	Hard
1123	single-row-keyboard	🔒		Easy
1124	string-transforms-into-another-string	🔒		Hard
1125	design-file-system	🔒		Medium
1126	minimum-cost-to-connect-sticks	🔒		Medium
1127	last-stone-weight			Easy
1128	remove-all-adjacent-duplicates-in-string		📝	Easy
1129	longest-string-chain			Medium
1130	last-stone-weight-ii			Medium
1131	count-substrings-with-only-one-distinct-letter	🔒		Easy
1132	before-and-after-puzzle	🔒		Medium
1133	last-substring-in-lexicographical-order			Hard
1134	shortest-distance-to-target-color	🔒		Medium
1137	height-checker			Easy
1138	grumpy-bookstore-owner			Medium
1139	previous-permutation-with-one-swap			Medium
1140	distant-barcodes			Medium
1141	how-many-apples-can-you-put-into-the-basket	🔒		Easy
1142	minimum-knight-moves	🔒		Medium
1143	find-smallest-common-element-in-all-rows	🔒		Medium
1144	optimize-water-distribution-in-a-village	🔒		Hard
1145	number-of-submatrices-that-sum-to-target			Hard
1146	greatest-common-divisor-of-strings			Easy
1147	flip-columns-for-maximum-number-of-equal-rows			Medium
1148	adding-two-negabinary-numbers			Medium
1152	maximum-number-of-ones	🔒		Hard
1156	occurrences-after-bigram			Easy
1157	insufficient-nodes-in-root-to-leaf-paths			Medium
1159	smallest-subsequence-of-distinct-characters			Medium
1160	letter-tile-possibilities			Medium
1167	minimum-time-to-build-blocks	🔒		Hard
1168	duplicate-zeros			Easy
1169	largest-values-from-labels			Medium
1170	shortest-common-supersequence			Hard
1171	shortest-path-in-binary-matrix			Medium
1183	statistics-from-a-large-sample			Medium
1184	car-pooling			Medium
1185	find-in-mountain-array			Hard
1188	brace-expansion-ii			Hard
1194	path-in-zigzag-labelled-binary-tree			Medium
1195	distribute-candies-to-people		📝	Easy
1196	filling-bookcase-shelves			Medium
1197	parsing-a-boolean-expression			Hard
1205	defanging-an-ip-address			Easy
1206	corporate-flight-bookings			Medium
1207	delete-nodes-and-return-forest			Medium
1208	maximum-nesting-depth-of-two-valid-parentheses-strings			Medium
1217	relative-sort-array			Easy
1218	lowest-common-ancestor-of-deepest-leaves			Medium
1219	longest-well-performing-interval			Medium
1220	smallest-sufficient-team			Hard
1227	number-of-equivalent-domino-pairs			Easy
1228	minimum-cost-tree-from-leaf-values			Medium
1229	shortest-path-with-alternating-colors			Medium
1230	maximum-of-absolute-value-expression			Medium
1236	n-th-tribonacci-number		📝	Easy
1238	alphabet-board-path			Medium
1239	largest-1-bordered-square			Medium
1240	stone-game-ii			Medium
1247	decrease-elements-to-make-array-zigzag			Medium
1248	binary-tree-coloring-game			Medium
1249	snapshot-array			Medium
1250	longest-common-subsequence			Medium
1251	longest-chunked-palindrome-decomposition			Hard
1260	day-of-the-year			Easy
1261	swap-for-longest-repeated-character-substring			Medium
1262	online-majority-element-in-subarray			Hard
1263	number-of-dice-rolls-with-target-sum			Medium
1267	remove-zero-sum-consecutive-nodes-from-linked-list			Medium
1270	dinner-plate-stacks			Hard
1272	invalid-transactions			Medium
1273	compare-strings-by-frequency-of-the-smallest-character			Easy
1279	prime-arrangements			Easy
1280	diet-plan-performance	🔒		Easy
1281	can-make-palindrome-from-substring			Medium
1282	number-of-valid-words-for-each-puzzle			Hard
1287	distance-between-bus-stops			Easy
1288	maximum-subarray-sum-with-one-deletion			Medium
1289	day-of-the-week			Easy
1290	make-array-strictly-increasing			Hard
1297	maximum-number-of-balloons			Easy
1298	reverse-substrings-between-each-pair-of-parentheses			Medium
1299	k-concatenation-maximum-sum			Medium
1300	critical-connections-in-a-network			Hard
1306	minimum-absolute-difference			Easy
1307	ugly-number-iii			Medium
1308	smallest-string-with-swaps			Medium
1309	sort-items-by-groups-respecting-dependencies			Hard