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README.md

✏️ Leetcode Solutions with Python,Rust

Update time: 2019-04-08 13:15:22

Auto created by leetcode_generate

I have solved 100 / 973 problems while there are 140 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 Python Rust 📝 Easy
2 add-two-numbers Python 📝 Medium
3 longest-substring-without-repeating-characters Python 📝 Medium
4 median-of-two-sorted-arrays Python 📝 Hard
5 longest-palindromic-substring Python 📝 Medium
6 zigzag-conversion Python 📝 Medium
7 reverse-integer Python 📝 Easy
8 string-to-integer-atoi Python Medium
9 palindrome-number Python 📝 Easy
10 regular-expression-matching Python 📝 Hard
11 container-with-most-water Python 📝 Medium
12 integer-to-roman Python Medium
13 roman-to-integer Python Easy
14 longest-common-prefix Python 📝 Easy
15 3sum Python Medium
16 3sum-closest Python Medium
17 letter-combinations-of-a-phone-number Python 📝 Medium
18 4sum Python Medium
19 remove-nth-node-from-end-of-list Python 📝 Medium
20 valid-parentheses Python 📝 Easy
21 merge-two-sorted-lists Python 📝 Easy
22 generate-parentheses Python 📝 Medium
23 merge-k-sorted-lists Python 📝 Hard
24 swap-nodes-in-pairs Python Medium
25 reverse-nodes-in-k-group Python Hard
26 remove-duplicates-from-sorted-array Python 📝 Easy
27 remove-element Python 📝 Easy
28 implement-strstr Python 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 Python 📝 Medium
35 search-insert-position Python Easy
36 valid-sudoku 📝 Medium
37 sudoku-solver 📝 Hard
38 count-and-say Python Easy
39 combination-sum Python Medium
40 combination-sum-ii Medium
41 first-missing-positive Python 📝 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 Python 📝 Medium
49 group-anagrams 📝 Medium
50 powx-n Python 📝 Medium
51 n-queens 📝 Hard
52 n-queens-ii 📝 Hard
53 maximum-subarray Python Easy
54 spiral-matrix Python 📝 Medium
55 jump-game Python 📝 Medium
56 merge-intervals Python 📝 Medium
57 insert-interval Python Hard
58 length-of-last-word Python 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 Python Easy
67 add-binary Python Easy
68 text-justification Hard
69 sqrtx Easy
70 climbing-stairs Python 📝 Easy
71 simplify-path Python Medium
72 edit-distance 📝 Hard
73 set-matrix-zeroes Python 📝 Medium
74 search-a-2d-matrix Medium
75 sort-colors Python Medium
76 minimum-window-substring 📝 Hard
77 combinations Python 📝 Medium
78 subsets Python Medium
79 word-search Python Medium
80 remove-duplicates-from-sorted-array-ii Python Medium
81 search-in-rotated-sorted-array-ii Medium
82 remove-duplicates-from-sorted-list-ii Medium
83 remove-duplicates-from-sorted-list Python 📝 Easy
84 largest-rectangle-in-histogram 📝 Hard
85 maximal-rectangle 📝 Hard
86 partition-list Python 📝 Medium
87 scramble-string Hard
88 merge-sorted-array Python 📝 Easy
89 gray-code Medium
90 subsets-ii Medium
91 decode-ways Medium
92 reverse-linked-list-ii 📝 Medium
93 restore-ip-addresses Python 📝 Medium
94 binary-tree-inorder-traversal Python 📝 Medium
95 unique-binary-search-trees-ii 📝 Medium
96 unique-binary-search-trees 📝 Medium
97 interleaving-string Python 📝 Hard
98 validate-binary-search-tree 📝 Medium
99 recover-binary-search-tree Hard
100 same-tree Python 📝 Easy
101 symmetric-tree Python 📝 Easy
102 binary-tree-level-order-traversal 📝 Medium
103 binary-tree-zigzag-level-order-traversal Medium
104 maximum-depth-of-binary-tree Python 📝 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 Python Easy
108 convert-sorted-array-to-binary-search-tree Python Easy
109 convert-sorted-list-to-binary-search-tree 📝 Medium
110 balanced-binary-tree Easy
111 minimum-depth-of-binary-tree Python 📝 Easy
112 path-sum Python 📝 Easy
113 path-sum-ii Python 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 Python 📝 Easy
119 pascals-triangle-ii Python Easy
120 triangle Medium
121 best-time-to-buy-and-sell-stock Python 📝 Easy
122 best-time-to-buy-and-sell-stock-ii Python 📝 Easy
123 best-time-to-buy-and-sell-stock-iii Hard
124 binary-tree-maximum-path-sum 📝 Hard
125 valid-palindrome Python 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 Python 📝 Medium
135 candy 📝 Hard
136 single-number Python 📝 Easy
137 single-number-ii Python Medium
138 copy-list-with-random-pointer 📝 Medium
139 word-break 📝 Medium
140 word-break-ii 📝 Hard
141 linked-list-cycle 📝 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 📝 Hard
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 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 📝 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 📝 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 Python 📝 Easy
190 reverse-bits Easy
191 number-of-1-bits 📝 Easy
198 house-robber 📝 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 Easy
205 isomorphic-strings Easy
206 reverse-linked-list Python 📝 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 📝 Easy
218 the-skyline-problem 📝 Hard
219 contains-duplicate-ii 📝 Easy
220 contains-duplicate-iii 📝 Medium
221 maximal-square 📝 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 📝 Easy
227 basic-calculator-ii Python 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 Python 📝 Easy
238 product-of-array-except-self Medium
239 sliding-window-maximum 📝 Hard
240 search-a-2d-matrix-ii Python 📝 Medium
241 different-ways-to-add-parentheses Medium
242 valid-anagram Python 📝 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 Python Easy
264 ugly-number-ii Python 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 Python 📝 Medium
275 h-index-ii Python 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 Python 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 Python 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 Python 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 Python 📝 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 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 📝 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 Python 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 Python 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 Python 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 Python Medium
455 assign-cookies Python Easy
456 132-pattern 📝 Medium
457 circular-array-loop Medium
458 poor-pigs Python Hard
459 repeated-substring-pattern Easy
460 lfu-cache Hard
461 hamming-distance Python 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 Python 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 Python Easy
507 perfect-number 📝 Easy
508 most-frequent-subtree-sum Medium
509 inorder-successor-in-bst-ii 🔒 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 Python 📝 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 📝 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 📝 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 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 📝 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
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-log-files 📝 Easy
975 range-sum-of-bst 📝 Medium
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
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
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 Python Medium
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
1078 remove-outermost-parentheses Easy
1079 sum-of-root-to-leaf-binary-numbers Easy
1080 camelcase-matching Medium
1081 video-stitching Medium
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