1 | two-sum | javascript | :memo: | Easy |
2 | add-two-numbers | javascript | :memo: | Medium |
3 | longest-substring-without-repeating-characters | javascript | :memo: | Medium |
4 | median-of-two-sorted-arrays | javascript | | Hard |
5 | longest-palindromic-substring | javascript | :memo: | Medium |
6 | zigzag-conversion | javascript | | Easy |
7 | reverse-integer | javascript | | Easy |
8 | string-to-integer-atoi | | | Easy |
9 | palindrome-number | javascript | | Easy |
10 | regular-expression-matching | | | Hard |
11 | container-with-most-water | | :memo: | Medium |
12 | integer-to-roman | javascript | | Medium |
13 | roman-to-integer | javascript | | Easy |
14 | longest-common-prefix | javascript | :memo: | Easy |
15 | 3sum | javascript | | Medium |
16 | 3sum-closest | | | Medium |
17 | letter-combinations-of-a-phone-number | | | Medium |
18 | 4sum | | | Medium |
19 | remove-nth-node-from-end-of-list | javascript | :memo: | Easy |
20 | valid-parentheses | javascript | | Easy |
21 | merge-two-sorted-lists | javascript | | Easy |
22 | generate-parentheses | | | Medium |
23 | merge-k-sorted-lists | javascript | | Hard |
24 | swap-nodes-in-pairs | javascript | | Easy |
25 | reverse-nodes-in-k-group | javascript | | Hard |
26 | remove-duplicates-from-sorted-array | javascript | :memo: | Easy |
27 | remove-element | javascript | :memo: | Easy |
28 | implement-strstr | javascript | | Easy |
29 | divide-two-integers | | | Medium |
30 | substring-with-concatenation-of-all-words | | | Hard |
31 | next-permutation | | :memo: | Medium |
32 | longest-valid-parentheses | | | Hard |
33 | search-in-rotated-sorted-array | javascript | | Hard |
34 | search-for-a-range | javascript | | Medium |
35 | search-insert-position | javascript | | Medium |
36 | valid-sudoku | javascript | | Easy |
37 | sudoku-solver | | | Hard |
38 | count-and-say | | | Easy |
39 | combination-sum | | | Medium |
40 | combination-sum-ii | | | Medium |
41 | first-missing-positive | javascript | | 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 | anagrams | javascript | | Medium |
50 | powx-n | javascript | | Medium |
51 | n-queens | | | Hard |
52 | n-queens-ii | | | Hard |
53 | maximum-subarray | | | Medium |
54 | spiral-matrix | | | Medium |
55 | jump-game | javascript | :memo: | Medium |
56 | merge-intervals | | | Hard |
57 | insert-interval | | | Hard |
58 | length-of-last-word | javascript | | Easy |
59 | spiral-matrix-ii | | | Medium |
60 | permutation-sequence | | | Medium |
61 | rotate-list | javascript | | 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 | javascript | | Easy |
68 | text-justification | | | Hard |
69 | sqrtx | javascript | | Medium |
70 | climbing-stairs | javascript | | Easy |
71 | simplify-path | | | Medium |
72 | edit-distance | | | Hard |
73 | set-matrix-zeroes | javascript | | Medium |
74 | search-a-2d-matrix | | | Medium |
75 | sort-colors | javascript | | Medium |
76 | minimum-window-substring | | | Hard |
77 | combinations | | | Medium |
78 | subsets | javascript | | Medium |
79 | word-search | | | 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 | :memo: | Easy |
84 | largest-rectangle-in-histogram | | | Hard |
85 | maximal-rectangle | | | Hard |
86 | partition-list | javascript | | Medium |
87 | scramble-string | | | Hard |
88 | merge-sorted-array | javascript | | Easy |
89 | gray-code | | | Medium |
90 | subsets-ii | javascript | | Medium |
91 | decode-ways | | | Medium |
92 | reverse-linked-list-ii | javascript | | Medium |
93 | restore-ip-addresses | | | Medium |
94 | binary-tree-inorder-traversal | javascript | | 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 | javascript | | Easy |
101 | symmetric-tree | javascript | :memo: | Easy |
102 | binary-tree-level-order-traversal | | | Easy |
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 | | | Medium |
109 | convert-sorted-list-to-binary-search-tree | | | Medium |
110 | balanced-binary-tree | | | Easy |
111 | minimum-depth-of-binary-tree | javascript | | 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 | | | Hard |
118 | pascals-triangle | javascript | | Easy |
119 | pascals-triangle-ii | javascript | | Easy |
120 | triangle | javascript | | Medium |
121 | best-time-to-buy-and-sell-stock | javascript | :memo: | Easy |
122 | best-time-to-buy-and-sell-stock-ii | javascript | :memo: | Medium |
123 | best-time-to-buy-and-sell-stock-iii | | | Hard |
124 | binary-tree-maximum-path-sum | | | Hard |
125 | valid-palindrome | javascript | | Easy |
126 | word-ladder-ii | | | Hard |
127 | word-ladder | | | Medium |
128 | longest-consecutive-sequence | javascript | | 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 | javascript | | Medium |
138 | copy-list-with-random-pointer | | | Hard |
139 | word-break | | | Medium |
140 | word-break-ii | | | Hard |
141 | linked-list-cycle | javascript | :memo: | Easy |
142 | linked-list-cycle-ii | javascript | | Medium |
143 | reorder-list | javascript | | Medium |
144 | binary-tree-preorder-traversal | javascript | | Medium |
145 | binary-tree-postorder-traversal | javascript | | Hard |
146 | lru-cache | | | Hard |
147 | insertion-sort-list | javascript | | Medium |
148 | sort-list | | | Medium |
149 | max-points-on-a-line | | | Hard |
150 | evaluate-reverse-polish-notation | javascript | | Medium |
151 | reverse-words-in-a-string | javascript | | Medium |
152 | maximum-product-subarray | javascript | | Medium |
153 | find-minimum-in-rotated-sorted-array | javascript | | Medium |
154 | find-minimum-in-rotated-sorted-array-ii | javascript | | Hard |
155 | min-stack | javascript | | Easy |
156 | binary-tree-upside-down | :lock: | | Medium |
157 | read-n-characters-given-read4 | :lock: | | Easy |
158 | read-n-characters-given-read4-ii-call-multiple-times | :lock: | | Hard |
159 | longest-substring-with-at-most-two-distinct-characters | :lock: | | Hard |
160 | intersection-of-two-linked-lists | javascript | :memo: | Easy |
161 | one-edit-distance | :lock: | | Medium |
162 | find-peak-element | javascript | | Medium |
163 | missing-ranges | :lock: | | Medium |
164 | maximum-gap | | | Hard |
165 | compare-version-numbers | javascript | | Easy |
166 | fraction-to-recurring-decimal | | :memo: | Medium |
167 | two-sum-ii-input-array-is-sorted | javascript | :memo: | Medium |
168 | excel-sheet-column-title | javascript | | Easy |
169 | majority-element | javascript | | Easy |
170 | two-sum-iii-data-structure-design | :lock: | | Easy |
171 | excel-sheet-column-number | javascript | | Easy |
172 | factorial-trailing-zeroes | javascript | | Easy |
173 | binary-search-tree-iterator | | | Medium |
174 | dungeon-game | | | Hard |
179 | largest-number | | | Medium |
186 | reverse-words-in-a-string-ii | :lock: | | Medium |
187 | repeated-dna-sequences | | | Medium |
188 | best-time-to-buy-and-sell-stock-iv | | | Hard |
189 | rotate-array | javascript | :memo: | Easy |
190 | reverse-bits | javascript | | Easy |
191 | number-of-1-bits | javascript | :memo: | Easy |
198 | house-robber | javascript | :memo: | Easy |
199 | binary-tree-right-side-view | | | Medium |
200 | number-of-islands | | | Medium |
201 | bitwise-and-of-numbers-range | | | Medium |
202 | happy-number | javascript | | Easy |
203 | remove-linked-list-elements | javascript | | Easy |
204 | count-primes | javascript | | Easy |
205 | isomorphic-strings | javascript | | Easy |
206 | reverse-linked-list | javascript | :memo: | Easy |
207 | course-schedule | | | Medium |
208 | implement-trie-prefix-tree | | :memo: | 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 | :memo: | Easy |
218 | the-skyline-problem | | | Hard |
219 | contains-duplicate-ii | javascript | :memo: | Easy |
220 | contains-duplicate-iii | | :memo: | Medium |
221 | maximal-square | | :memo: | Medium |
222 | count-complete-tree-nodes | | | Medium |
223 | rectangle-area | javascript | | Easy |
224 | basic-calculator | | | Hard |
225 | implement-stack-using-queues | javascript | :memo: | Easy |
226 | invert-binary-tree | javascript | :memo: | Easy |
227 | basic-calculator-ii | | | Medium |
228 | summary-ranges | javascript | :memo: | Medium |
229 | majority-element-ii | javascript | | Medium |
230 | kth-smallest-element-in-a-bst | | | Medium |
231 | power-of-two | javascript | | Easy |
232 | implement-queue-using-stacks | javascript | :memo: | Easy |
233 | number-of-digit-one | | | Hard |
234 | palindrome-linked-list | javascript | | Easy |
235 | lowest-common-ancestor-of-a-binary-search-tree | javascript | | Easy |
236 | lowest-common-ancestor-of-a-binary-tree | | | Medium |
237 | delete-node-in-a-linked-list | javascript | :memo: | Easy |
238 | product-of-array-except-self | javascript | | Medium |
239 | sliding-window-maximum | | | Hard |
240 | search-a-2d-matrix-ii | javascript | | Medium |
241 | different-ways-to-add-parentheses | | | Medium |
242 | valid-anagram | javascript | :memo: | Easy |
243 | shortest-word-distance | :lock: | :memo: | Easy |
244 | shortest-word-distance-ii | :lock: | | Medium |
245 | shortest-word-distance-iii | :lock: | | Medium |
246 | strobogrammatic-number | :lock: | | Easy |
247 | strobogrammatic-number-ii | :lock: | | Medium |
248 | strobogrammatic-number-iii | :lock: | | Hard |
249 | group-shifted-strings | :lock: | | Easy |
250 | count-univalue-subtrees | :lock: | | Medium |
251 | flatten-2d-vector | :lock: | | Medium |
252 | meeting-rooms | :lock: | :memo: | Easy |
253 | meeting-rooms-ii | :lock: | | Medium |
254 | factor-combinations | :lock: | | Medium |
255 | verify-preorder-sequence-in-binary-search-tree | :lock: | | Medium |
256 | paint-house | :lock: | | Medium |
257 | binary-tree-paths | | | Easy |
258 | add-digits | javascript | | Easy |
259 | 3sum-smaller | :lock: | :memo: | Medium |
260 | single-number-iii | javascript | | Medium |
261 | graph-valid-tree | :lock: | | Medium |
263 | ugly-number | javascript | | Easy |
264 | ugly-number-ii | | | Medium |
265 | paint-house-ii | :lock: | | Hard |
266 | palindrome-permutation | :lock: | | Easy |
267 | palindrome-permutation-ii | :lock: | | Medium |
268 | missing-number | javascript | | Medium |
269 | alien-dictionary | :lock: | | Hard |
270 | closest-binary-search-tree-value | :lock: | | Easy |
271 | encode-and-decode-strings | :lock: | | Medium |
272 | closest-binary-search-tree-value-ii | :lock: | | Hard |
273 | integer-to-english-words | | | Hard |
274 | h-index | | :memo: | Medium |
275 | h-index-ii | | | Medium |
276 | paint-fence | :lock: | | Easy |
277 | find-the-celebrity | :lock: | | Medium |
278 | first-bad-version | javascript | :memo: | Easy |
279 | perfect-squares | | | Medium |
280 | wiggle-sort | :lock: | :memo: | Medium |
281 | zigzag-iterator | :lock: | | Medium |
282 | expression-add-operators | | | Hard |
283 | move-zeroes | javascript | :memo: | Easy |
284 | peeking-iterator | | | Medium |
285 | inorder-successor-in-bst | :lock: | | Medium |
286 | walls-and-gates | :lock: | :memo: | Medium |
287 | find-the-duplicate-number | javascript | | Hard |
288 | unique-word-abbreviation | :lock: | :memo: | Easy |
289 | game-of-life | | | Medium |
290 | word-pattern | javascript | | Easy |
291 | word-pattern-ii | :lock: | | Hard |
292 | nim-game | javascript | :memo: | Easy |
293 | flip-game | :lock: | | Easy |
294 | flip-game-ii | :lock: | | Medium |
295 | find-median-from-data-stream | | | Hard |
296 | best-meeting-point | :lock: | :memo: | Hard |
297 | serialize-and-deserialize-binary-tree | | | Hard |
298 | binary-tree-longest-consecutive-sequence | :lock: | :memo: | Medium |
299 | bulls-and-cows | javascript | | Easy |
300 | longest-increasing-subsequence | | | Medium |
301 | remove-invalid-parentheses | | | Hard |
302 | smallest-rectangle-enclosing-black-pixels | :lock: | | Hard |
303 | range-sum-query-immutable | javascript | :memo: | Easy |
304 | range-sum-query-2d-immutable | | :memo: | Medium |
305 | number-of-islands-ii | :lock: | | Hard |
306 | additive-number | | | Medium |
307 | range-sum-query-mutable | | :memo: | Medium |
308 | range-sum-query-2d-mutable | :lock: | | Hard |
309 | best-time-to-buy-and-sell-stock-with-cooldown | | | Medium |
310 | minimum-height-trees | | | Medium |
311 | sparse-matrix-multiplication | :lock: | | Medium |
312 | burst-balloons | | | Hard |
313 | super-ugly-number | | | Medium |
314 | binary-tree-vertical-order-traversal | :lock: | | Medium |
315 | count-of-smaller-numbers-after-self | | | Hard |
316 | remove-duplicate-letters | | | Hard |
317 | shortest-distance-from-all-buildings | :lock: | | Hard |
318 | maximum-product-of-word-lengths | | | Medium |
319 | bulb-switcher | javascript | | Medium |
320 | generalized-abbreviation | :lock: | | Medium |
321 | create-maximum-number | | | Hard |
322 | coin-change | | :memo: | Medium |
323 | number-of-connected-components-in-an-undirected-graph | :lock: | | Medium |
324 | wiggle-sort-ii | | | Medium |
325 | maximum-size-subarray-sum-equals-k | :lock: | | Medium |
326 | power-of-three | javascript | :memo: | Easy |
327 | count-of-range-sum | | | Hard |
328 | odd-even-linked-list | javascript | :memo: | 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 | :lock: | | Medium |
334 | increasing-triplet-subsequence | | | Medium |
335 | self-crossing | | | Hard |
336 | palindrome-pairs | | | Hard |
337 | house-robber-iii | | | Medium |
338 | counting-bits | javascript | | Medium |
339 | nested-list-weight-sum | :lock: | :memo: | Easy |
340 | longest-substring-with-at-most-k-distinct-characters | :lock: | | Hard |
341 | flatten-nested-list-iterator | | | Medium |
342 | power-of-four | javascript | | Easy |
343 | integer-break | | | Medium |
344 | reverse-string | javascript | | Easy |
345 | reverse-vowels-of-a-string | javascript | | Easy |
346 | moving-average-from-data-stream | :lock: | | Easy |
347 | top-k-frequent-elements | javascript | | Medium |
348 | design-tic-tac-toe | :lock: | | Medium |
349 | intersection-of-two-arrays | javascript | | Easy |
350 | intersection-of-two-arrays-ii | javascript | | Easy |
351 | android-unlock-patterns | :lock: | :memo: | Medium |
352 | data-stream-as-disjoint-intervals | | | Hard |
353 | design-snake-game | :lock: | | Medium |
354 | russian-doll-envelopes | | | Hard |
355 | design-twitter | | | Medium |
356 | line-reflection | :lock: | | Medium |
357 | count-numbers-with-unique-digits | | | Medium |
358 | rearrange-string-k-distance-apart | :lock: | | Hard |
359 | logger-rate-limiter | :lock: | | Easy |
360 | sort-transformed-array | :lock: | | Medium |
361 | bomb-enemy | :lock: | | Medium |
362 | design-hit-counter | :lock: | | Medium |
363 | max-sum-of-sub-matrix-no-larger-than-k | | | Hard |
364 | nested-list-weight-sum-ii | :lock: | | Medium |
365 | water-and-jug-problem | | | Medium |
366 | find-leaves-of-binary-tree | :lock: | | Medium |
367 | valid-perfect-square | | | Medium |
368 | largest-divisible-subset | | | Medium |
369 | plus-one-linked-list | :lock: | | Medium |
370 | range-addition | :lock: | :memo: | 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 | javascript | :memo: | Easy |
375 | guess-number-higher-or-lower-ii | | | Medium |
376 | wiggle-subsequence | | :memo: | Medium |
377 | combination-sum-iv | | | Medium |
378 | kth-smallest-element-in-a-sorted-matrix | | | Medium |
379 | design-phone-directory | :lock: | | Medium |
380 | insert-delete-getrandom-o1 | | | Hard |
381 | insert-delete-getrandom-o1-duplicates-allowed | | | Hard |
382 | linked-list-random-node | | | Medium |
383 | ransom-note | javascript | | 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 | javascript | | Easy |
390 | elimination-game | | | Medium |
391 | perfect-rectangle | | | Hard |
392 | is-subsequence | javascript | | Medium |
393 | utf-8-validation | | | Medium |
394 | decode-string | | | Medium |
395 | longest-substring-with-at-least-k-repeating-characters | | | Medium |
396 | rotate-function | javascript | | Easy |
397 | integer-replacement | | | Medium |
398 | random-pick-index | | | Medium |
399 | evaluate-division | | | Medium |
400 | nth-digit | javascript | | Easy |
401 | binary-watch | javascript | | Easy |
402 | remove-k-digits | | | Medium |
403 | frog-jump | | | Hard |
404 | sum-of-left-leaves | javascript | | Easy |
405 | convert-a-number-to-hexadecimal | javascript | | Easy |
406 | queue-reconstruction-by-height | | | Medium |
407 | trapping-rain-water-ii | | | Hard |
408 | valid-word-abbreviation | :lock: | | Easy |
409 | longest-palindrome | javascript | | Easy |
410 | split-array-largest-sum | | | Hard |
411 | minimum-unique-word-abbreviation | :lock: | | Hard |
412 | fizz-buzz | javascript | | Easy |
413 | arithmetic-slices | | | Medium |
414 | third-maximum-number | javascript | | Easy |
415 | add-strings | javascript | | Easy |
416 | partition-equal-subset-sum | | | Medium |
417 | pacific-atlantic-water-flow | | | Medium |
418 | sentence-screen-fitting | :lock: | | 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 | :lock: | | Easy |
423 | reconstruct-original-digits-from-english | | | Medium |
424 | longest-repeating-character-replacement | | | Medium |
425 | word-squares | :lock: | | Hard |
432 | all-oone-data-structure | | | Hard |
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 | :lock: | | Medium |
440 | k-th-smallest-in-lexicographical-order | | | Hard |
441 | arranging-coins | javascript | | Easy |
444 | sequence-reconstruction | :lock: | | Medium |
446 | arithmetic-slices-ii-subsequence | | | Hard |
447 | number-of-boomerangs | | | Easy |
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 |
459 | repeated-substring-pattern | | | Easy |
462 | minimum-moves-to-equal-array-elements-ii | | | Medium |
463 | island-perimeter | | | Easy |
464 | can-i-win | | | Medium |
465 | optimal-account-balancing | :lock: | | Hard |