| 001 |
two-sum |
python |
Easy |
| 002 |
add-two-numbers |
python |
Medium |
| 003 |
longest-substring-without-repeating-characters |
python |
Medium |
| 004 |
median-of-two-sorted-arrays |
python |
hard |
| 005 |
longest-palindromic-substring |
python |
Medium |
| 006 |
zigzag-conversion |
python |
Medium |
| 007 |
reverse-integer |
python |
Easy |
| 008 |
string-to-integer-atoi |
python |
Medium |
| 009 |
palindrome-number |
python |
Easy |
| 010 |
regular-expression-matching |
python |
hard |
| 011 |
container-with-most-water |
python |
Medium |
| 012 |
integer-to-roman |
python |
Medium |
| 013 |
roman-to-integer |
python |
Easy |
| 014 |
longest-common-prefix |
python |
Easy |
| 015 |
3sum |
python |
Medium |
| 016 |
3sum-closest |
python |
Medium |
| 017 |
letter-combinations-of-a-phone-number |
python |
Medium |
| 018 |
4sum |
python |
Medium |
| 019 |
remove-nth-node-from-end-of-list |
python |
Medium |
| 020 |
valid-parentheses |
python |
Easy |
| 021 |
merge-two-sorted-lists |
python |
Easy |
| 022 |
generate-parentheses |
python |
Medium |
| 023 |
merge-k-sorted-lists |
python |
hard |
| 024 |
swap-nodes-in-pairs |
python |
Medium |
| 025 |
reverse-nodes-in-k-group |
python |
hard |
| 026 |
remove-duplicates-from-sorted-array |
python |
Easy |
| 027 |
remove-element |
python |
Easy |
| 028 |
implement-strstr |
python |
Easy |
| 029 |
divide-two-integers |
python |
Medium |
| 030 |
substring-with-concatenation-of-all-words |
python |
hard |
| 031 |
next-permutation |
python |
Medium |
| 032 |
longest-valid-parentheses |
python |
hard |
| 033 |
search-in-rotated-sorted-array |
python |
Medium |
| 034 |
search-for-a-range |
python |
Medium |
| 035 |
search-insert-position |
python |
Easy |
| 036 |
valid-sudoku |
python |
Medium |
| 037 |
sudoku-solver |
python |
hard |
| 038 |
count-and-say |
python |
Easy |
| 039 |
combination-sum |
python |
Medium |
| 040 |
combination-sum-ii |
python |
Medium |
| 041 |
first-missing-positive |
python |
hard |
| 042 |
trapping-rain-water |
python |
hard |
| 043 |
multiply-strings |
python |
Medium |
| 044 |
wildcard-matching |
python |
hard |
| 045 |
jump-game-ii |
python |
hard |
| 046 |
permutations |
python |
Medium |
| 047 |
permutations-ii |
python |
Medium |
| 048 |
rotate-image |
python |
Medium |
| 049 |
anagrams |
python |
Medium |
| 050 |
powx-n |
python |
Medium |
| 051 |
n-queens |
python |
hard |
| 052 |
n-queens-ii |
python |
hard |
| 053 |
maximum-subarray |
python |
Easy |
| 054 |
spiral-matrix |
python |
Medium |
| 055 |
jump-game |
python |
Medium |
| 056 |
merge-intervals |
python |
Medium |
| 057 |
insert-interval |
python |
hard |
| 058 |
length-of-last-word |
python |
Easy |
| 059 |
spiral-matrix-ii |
python |
Medium |
| 060 |
permutation-sequence |
python |
Medium |
| 061 |
rotate-list |
python |
Medium |
| 062 |
unique-paths |
python |
Medium |
| 063 |
unique-paths-ii |
python |
Medium |
| 064 |
minimum-path-sum |
python |
Medium |
| 065 |
valid-number |
python |
hard |
| 066 |
plus-one |
python |
Easy |
| 067 |
add-binary |
python |
Easy |
| 068 |
text-justification |
python |
hard |
| 069 |
sqrtx |
python |
Easy |
| 070 |
climbing-stairs |
python |
Easy |
| 071 |
simplify-path |
python |
Medium |
| 072 |
edit-distance |
python |
hard |
| 073 |
set-matrix-zeroes |
python |
Medium |
| 074 |
search-a-2d-matrix |
python |
Medium |
| 075 |
sort-colors |
python |
Medium |
| 076 |
minimum-window-substring |
python |
hard |
| 077 |
combinations |
python |
Medium |
| 078 |
subsets |
python |
Medium |
| 079 |
word-search |
python |
Medium |
| 080 |
remove-duplicates-from-sorted-array-ii |
python |
Medium |
| 081 |
search-in-rotated-sorted-array-ii |
python |
Medium |
| 082 |
remove-duplicates-from-sorted-list-ii |
python |
Medium |
| 083 |
remove-duplicates-from-sorted-list |
python |
Easy |
| 084 |
largest-rectangle-in-histogram |
python |
hard |
| 085 |
maximal-rectangle |
python |
hard |
| 086 |
partition-list |
python |
Medium |
| 087 |
scramble-string |
python |
hard |
| 088 |
merge-sorted-array |
python |
Easy |
| 089 |
gray-code |
python |
Medium |
| 090 |
subsets-ii |
python |
Medium |
| 091 |
decode-ways |
python |
Medium |
| 092 |
reverse-linked-list-ii |
python |
Medium |
| 093 |
restore-ip-addresses |
python |
Medium |
| 094 |
binary-tree-inorder-traversal |
python |
Medium |
| 095 |
unique-binary-search-trees-ii |
python |
Medium |
| 096 |
unique-binary-search-trees |
python |
Medium |
| 097 |
interleaving-string |
python |
hard |
| 098 |
validate-binary-search-tree |
python |
Medium |
| 099 |
recover-binary-search-tree |
python |
hard |
| 100 |
same-tree |
python |
Easy |
| 101 |
symmetric-tree |
python |
Easy |
| 102 |
binary-tree-level-order-traversal |
python |
Medium |
| 103 |
binary-tree-zigzag-level-order-traversal |
python |
Medium |
| 104 |
maximum-depth-of-binary-tree |
python |
Easy |
| 105 |
construct-binary-tree-from-preorder-and-inorder-traversal |
python |
Medium |
| 106 |
construct-binary-tree-from-inorder-and-postorder-traversal |
python |
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 |
python |
Medium |
| 110 |
balanced-binary-tree |
python |
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 |
python |
Medium |
| 115 |
distinct-subsequences |
python |
hard |
| 116 |
populating-next-right-pointers-in-each-node |
python |
Medium |
| 117 |
populating-next-right-pointers-in-each-node-ii |
python |
Medium |
| 118 |
pascals-triangle |
python |
Easy |
| 119 |
pascals-triangle-ii |
python |
Easy |
| 120 |
triangle |
python |
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 |
python |
hard |
| 124 |
binary-tree-maximum-path-sum |
python |
hard |
| 125 |
valid-palindrome |
python |
Easy |
| 126 |
word-ladder-ii |
python |
hard |
| 127 |
word-ladder |
python |
Medium |
| 128 |
longest-consecutive-sequence |
python |
hard |
| 129 |
sum-root-to-leaf-numbers |
python |
Medium |
| 130 |
surrounded-regions |
python |
Medium |
| 131 |
palindrome-partitioning |
python |
Medium |
| 132 |
palindrome-partitioning-ii |
python |
hard |
| 133 |
clone-graph |
python |
Medium |
| 134 |
gas-station |
python |
Medium |
| 135 |
candy |
python |
hard |
| 136 |
single-number |
python |
Easy |
| 137 |
single-number-ii |
python |
Medium |
| 138 |
copy-list-with-random-pointer |
python |
Medium |
| 139 |
word-break |
python |
Medium |
| 140 |
word-break-ii |
python |
hard |
| 141 |
linked-list-cycle |
python |
Easy |
| 142 |
linked-list-cycle-ii |
python |
Medium |
| 143 |
reorder-list |
python |
Medium |
| 144 |
binary-tree-preorder-traversal |
python |
Medium |
| 145 |
binary-tree-postorder-traversal |
python |
hard |
| 146 |
lru-cache |
python |
hard |
| 147 |
insertion-sort-list |
python |
Medium |
| 148 |
sort-list |
python |
Medium |
| 149 |
max-points-on-a-line |
python |
hard |
| 150 |
evaluate-reverse-polish-notation |
python |
Medium |
| 151 |
reverse-words-in-a-string |
python |
Medium |
| 152 |
maximum-product-subarray |
python |
Medium |
| 153 |
find-minimum-in-rotated-sorted-array |
python |
Medium |
| 154 |
find-minimum-in-rotated-sorted-array-ii |
python |
hard |
| 155 |
min-stack |
python |
Easy |
| 156 |
binary-tree-upside-down |
python |
Medium |
| 157 |
read-n-characters-given-read4 |
python |
Easy |
| 158 |
read-n-characters-given-read4-ii-call-multiple-times |
python |
hard |
| 159 |
longest-substring-with-at-most-two-distinct-characters |
python |
hard |
| 160 |
intersection-of-two-linked-lists |
python |
Easy |
| 161 |
one-edit-distance |
python |
Medium |
| 162 |
find-peak-element |
python |
Medium |
| 163 |
missing-ranges |
python |
Medium |
| 164 |
maximum-gap |
python |
hard |
| 165 |
compare-version-numbers |
python |
Medium |
| 166 |
fraction-to-recurring-decimal |
python |
Medium |
| 167 |
two-sum-ii-input-array-is-sorted |
python |
Easy |
| 168 |
excel-sheet-column-title |
python |
Easy |
| 169 |
majority-element |
python |
Easy |
| 170 |
two-sum-iii-data-structure-design |
python |
Easy |
| 171 |
excel-sheet-column-number |
python |
Easy |
| 172 |
factorial-trailing-zeroes |
python |
Easy |
| 173 |
binary-search-tree-iterator |
python |
Medium |
| 174 |
dungeon-game |
python |
hard |
| 179 |
largest-number |
python |
Medium |
| 186 |
reverse-words-in-a-string-ii |
python |
Medium |
| 187 |
repeated-dna-sequences |
python |
Medium |
| 188 |
best-time-to-buy-and-sell-stock-iv |
python |
hard |
| 189 |
rotate-array |
python |
Easy |
| 190 |
reverse-bits |
python |
Easy |
| 191 |
number-of-1-bits |
python |
Easy |
| 198 |
house-robber |
python |
Easy |
| 199 |
binary-tree-right-side-view |
python |
Medium |
| 200 |
number-of-islands |
python |
Medium |
| 201 |
bitwise-and-of-numbers-range |
python |
Medium |
| 202 |
happy-number |
python |
Easy |
| 203 |
remove-linked-list-elements |
python |
Easy |
| 204 |
count-primes |
python |
Easy |
| 205 |
isomorphic-strings |
python |
Easy |
| 206 |
reverse-linked-list |
python |
Easy |
| 207 |
course-schedule |
python |
Medium |
| 208 |
implement-trie-prefix-tree |
python |
Medium |
| 209 |
minimum-size-subarray-sum |
python |
Medium |
| 210 |
course-schedule-ii |
python |
Medium |
| 211 |
add-and-search-word-data-structure-design |
python |
Medium |
| 212 |
word-search-ii |
python |
hard |
| 213 |
house-robber-ii |
python |
Medium |
| 214 |
shortest-palindrome |
python |
hard |
| 215 |
kth-largest-element-in-an-array |
python |
Medium |
| 216 |
combination-sum-iii |
python |
Medium |
| 217 |
contains-duplicate |
python |
Easy |
| 218 |
the-skyline-problem |
python |
hard |
| 219 |
contains-duplicate-ii |
python |
Easy |
| 220 |
contains-duplicate-iii |
python |
Medium |
| 221 |
maximal-square |
python |
Medium |
| 222 |
count-complete-tree-nodes |
python |
Medium |
| 223 |
rectangle-area |
python |
Medium |
| 224 |
basic-calculator |
python |
hard |
| 225 |
implement-stack-using-queues |
python |
Easy |
| 226 |
invert-binary-tree |
python |
Easy |
| 227 |
basic-calculator-ii |
python |
Medium |
| 228 |
summary-ranges |
python |
Medium |
| 229 |
majority-element-ii |
python |
Medium |
| 230 |
kth-smallest-element-in-a-bst |
python |
Medium |
| 231 |
power-of-two |
python |
Easy |
| 232 |
implement-queue-using-stacks |
python |
Easy |
| 233 |
number-of-digit-one |
python |
hard |
| 234 |
palindrome-linked-list |
python |
Easy |
| 235 |
lowest-common-ancestor-of-a-binary-search-tree |
python |
Easy |
| 236 |
lowest-common-ancestor-of-a-binary-tree |
python |
Medium |
| 237 |
delete-node-in-a-linked-list |
python |
Easy |
| 238 |
product-of-array-except-self |
python |
Medium |
| 239 |
sliding-window-maximum |
python |
hard |
| 240 |
search-a-2d-matrix-ii |
python |
Medium |
| 241 |
different-ways-to-add-parentheses |
python |
Medium |
| 242 |
valid-anagram |
python |
Easy |
| 243 |
shortest-word-distance |
python |
Easy |
| 244 |
shortest-word-distance-ii |
python |
Medium |
| 245 |
shortest-word-distance-iii |
python |
Medium |
| 246 |
strobogrammatic-number |
python |
Easy |
| 247 |
strobogrammatic-number-ii |
python |
Medium |
| 248 |
strobogrammatic-number-iii |
python |
hard |
| 249 |
group-shifted-strings |
python |
Medium |
| 250 |
count-univalue-subtrees |
python |
Medium |
| 251 |
flatten-2d-vector |
python |
Medium |
| 252 |
meeting-rooms |
python |
Easy |
| 253 |
meeting-rooms-ii |
python |
Medium |
| 254 |
factor-combinations |
python |
Medium |
| 255 |
verify-preorder-sequence-in-binary-search-tree |
python |
Medium |
| 256 |
paint-house |
python |
Easy |
| 257 |
binary-tree-paths |
python |
Easy |
| 258 |
add-digits |
python |
Easy |
| 259 |
3sum-smaller |
python |
Medium |
| 260 |
single-number-iii |
python |
Medium |
| 261 |
graph-valid-tree |
python |
Medium |
| 263 |
ugly-number |
python |
Easy |
| 264 |
ugly-number-ii |
python |
Medium |
| 265 |
paint-house-ii |
python |
hard |
| 266 |
palindrome-permutation |
python |
Easy |
| 267 |
palindrome-permutation-ii |
python |
Medium |
| 268 |
missing-number |
python |
Easy |
| 269 |
alien-dictionary |
python |
hard |
| 270 |
closest-binary-search-tree-value |
python |
Easy |
| 271 |
encode-and-decode-strings |
python |
Medium |
| 272 |
closest-binary-search-tree-value-ii |
python |
hard |
| 273 |
integer-to-english-words |
python |
hard |
| 274 |
h-index |
python |
Medium |
| 275 |
h-index-ii |
python |
Medium |
| 276 |
paint-fence |
python |
Easy |
| 277 |
find-the-celebrity |
python |
Medium |
| 278 |
first-bad-version |
python |
Easy |
| 279 |
perfect-squares |
python |
Medium |
| 280 |
wiggle-sort |
python |
Medium |
| 281 |
zigzag-iterator |
python |
Medium |
| 282 |
expression-add-operators |
python |
hard |
| 283 |
move-zeroes |
python |
Easy |
| 284 |
peeking-iterator |
python |
Medium |
| 285 |
inorder-successor-in-bst |
python |
Medium |
| 286 |
walls-and-gates |
python |
Medium |
| 287 |
find-the-duplicate-number |
python |
Medium |
| 288 |
unique-word-abbreviation |
python |
Medium |
| 289 |
game-of-life |
python |
Medium |
| 290 |
word-pattern |
python |
Easy |
| 291 |
word-pattern-ii |
python |
hard |
| 292 |
nim-game |
python |
Easy |
| 293 |
flip-game |
python |
Easy |
| 294 |
flip-game-ii |
python |
Medium |
| 295 |
find-median-from-data-stream |
python |
hard |
| 296 |
best-meeting-point |
python |
hard |
| 297 |
serialize-and-deserialize-binary-tree |
python |
hard |
| 298 |
binary-tree-longest-consecutive-sequence |
python |
Medium |
| 299 |
bulls-and-cows |
python |
Medium |
| 300 |
longest-increasing-subsequence |
python |
Medium |
| 301 |
remove-invalid-parentheses |
python |
hard |
| 302 |
smallest-rectangle-enclosing-black-pixels |
python |
hard |
| 303 |
range-sum-query-immutable |
python |
Easy |
| 304 |
range-sum-query-2d-immutable |
python |
Medium |
| 305 |
number-of-islands-ii |
python |
hard |
| 306 |
additive-number |
python |
Medium |
| 307 |
range-sum-query-mutable |
python |
Medium |
| 308 |
range-sum-query-2d-mutable |
python |
hard |
| 309 |
best-time-to-buy-and-sell-stock-with-cooldown |
python |
Medium |
| 310 |
minimum-height-trees |
python |
Medium |
| 311 |
sparse-matrix-multiplication |
python |
Medium |
| 312 |
burst-balloons |
python |
hard |
| 313 |
super-ugly-number |
python |
Medium |
| 314 |
binary-tree-vertical-order-traversal |
python |
Medium |
| 315 |
count-of-smaller-numbers-after-self |
python |
hard |
| 316 |
remove-duplicate-letters |
python |
hard |
| 317 |
shortest-distance-from-all-buildings |
python |
hard |
| 318 |
maximum-product-of-word-lengths |
python |
Medium |
| 319 |
bulb-switcher |
python |
Medium |
| 320 |
generalized-abbreviation |
python |
Medium |
| 321 |
create-maximum-number |
python |
hard |
| 322 |
coin-change |
python |
Medium |
| 323 |
number-of-connected-components-in-an-undirected-graph |
python |
Medium |
| 324 |
wiggle-sort-ii |
python |
Medium |
| 325 |
maximum-size-subarray-sum-equals-k |
python |
Medium |
| 326 |
power-of-three |
python |
Easy |
| 327 |
count-of-range-sum |
python |
hard |
| 328 |
odd-even-linked-list |
python |
Medium |
| 329 |
longest-increasing-path-in-a-matrix |
python |
hard |
| 330 |
patching-array |
python |
hard |
| 331 |
verify-preorder-serialization-of-a-binary-tree |
python |
Medium |
| 332 |
reconstruct-itinerary |
python |
Medium |
| 333 |
largest-bst-subtree |
python |
Medium |
| 334 |
increasing-triplet-subsequence |
python |
Medium |
| 335 |
self-crossing |
python |
hard |
| 336 |
palindrome-pairs |
python |
hard |
| 337 |
house-robber-iii |
python |
Medium |
| 338 |
counting-bits |
python |
Medium |
| 339 |
nested-list-weight-sum |
python |
Easy |
| 340 |
longest-substring-with-at-most-k-distinct-characters |
python |
hard |
| 341 |
flatten-nested-list-iterator |
python |
Medium |
| 342 |
power-of-four |
python |
Easy |
| 343 |
integer-break |
python |
Medium |
| 344 |
reverse-string |
python |
Easy |
| 345 |
reverse-vowels-of-a-string |
python |
Easy |
| 346 |
moving-average-from-data-stream |
python |
Easy |
| 347 |
top-k-frequent-elements |
python |
Medium |
| 348 |
design-tic-tac-toe |
python |
Medium |
| 349 |
intersection-of-two-arrays |
python |
Easy |
| 350 |
intersection-of-two-arrays-ii |
python |
Easy |
| 351 |
android-unlock-patterns |
python |
Medium |
| 352 |
data-stream-as-disjoint-intervals |
python |
hard |
| 353 |
design-snake-game |
python |
Medium |
| 354 |
russian-doll-envelopes |
python |
hard |
| 355 |
design-twitter |
python |
Medium |
| 356 |
line-reflection |
python |
Medium |
| 357 |
count-numbers-with-unique-digits |
python |
Medium |
| 358 |
rearrange-string-k-distance-apart |
python |
hard |
| 359 |
logger-rate-limiter |
python |
Easy |
| 360 |
sort-transformed-array |
python |
Medium |
| 361 |
bomb-enemy |
python |
Medium |
| 362 |
design-hit-counter |
python |
Medium |
| 363 |
max-sum-of-sub-matrix-no-larger-than-k |
python |
hard |
| 364 |
nested-list-weight-sum-ii |
python |
Medium |
| 365 |
water-and-jug-problem |
python |
Medium |
| 366 |
find-leaves-of-binary-tree |
python |
Medium |
| 367 |
valid-perfect-square |
python |
Easy |
| 368 |
largest-divisible-subset |
python |
Medium |
| 369 |
plus-one-linked-list |
python |
Medium |
| 370 |
range-addition |
python |
Medium |
| 371 |
sum-of-two-integers |
python |
Easy |
| 372 |
super-pow |
python |
Medium |
| 373 |
find-k-pairs-with-smallest-sums |
python |
Medium |
| 374 |
guess-number-higher-or-lower |
python |
Easy |
| 375 |
guess-number-higher-or-lower-ii |
python |
Medium |
| 376 |
wiggle-subsequence |
python |
Medium |
| 377 |
combination-sum-iv |
python |
Medium |
| 378 |
kth-smallest-element-in-a-sorted-matrix |
python |
Medium |
| 379 |
design-phone-directory |
python |
Medium |
| 380 |
insert-delete-getrandom-o1 |
python |
Medium |
| 381 |
insert-delete-getrandom-o1-duplicates-allowed |
python |
hard |
| 382 |
linked-list-random-node |
python |
Medium |
| 383 |
ransom-note |
python |
Easy |
| 384 |
shuffle-an-array |
python |
Medium |
| 385 |
mini-parser |
python |
Medium |
| 386 |
lexicographical-numbers |
python |
Medium |
| 387 |
first-unique-character-in-a-string |
python |
Easy |
| 388 |
longest-absolute-file-path |
python |
Medium |
| 389 |
find-the-difference |
python |
Easy |
| 390 |
elimination-game |
python |
Medium |
| 391 |
perfect-rectangle |
python |
hard |
| 392 |
is-subsequence |
python |
Medium |
| 393 |
utf-8-validation |
python |
Medium |
| 394 |
decode-string |
python |
Medium |
| 395 |
longest-substring-with-at-least-k-repeating-characters |
python |
Medium |
| 396 |
rotate-function |
python |
Medium |
| 397 |
integer-replacement |
python |
Medium |
| 398 |
random-pick-index |
python |
Medium |
| 399 |
evaluate-division |
python |
Medium |
| 400 |
nth-digit |
python |
Easy |
| 401 |
binary-watch |
python |
Easy |
| 402 |
remove-k-digits |
python |
Medium |
| 403 |
frog-jump |
python |
hard |
| 404 |
sum-of-left-leaves |
python |
Easy |
| 405 |
convert-a-number-to-hexadecimal |
python |
Easy |
| 406 |
queue-reconstruction-by-height |
python |
Medium |
| 407 |
trapping-rain-water-ii |
python |
hard |
| 408 |
valid-word-abbreviation |
python |
Easy |
| 409 |
longest-palindrome |
python |
Easy |
| 410 |
split-array-largest-sum |
python |
hard |
| 411 |
minimum-unique-word-abbreviation |
python |
hard |
| 412 |
fizz-buzz |
python |
Easy |
| 413 |
arithmetic-slices |
python |
Medium |
| 414 |
third-maximum-number |
python |
Easy |
| 415 |
add-strings |
python |
Easy |
| 416 |
partition-equal-subset-sum |
python |
Medium |
| 417 |
pacific-atlantic-water-flow |
python |
Medium |
| 418 |
sentence-screen-fitting |
python |
Medium |
| 419 |
battleships-in-a-board |
python |
Medium |
| 420 |
strong-password-checker |
python |
hard |
| 421 |
maximum-xor-of-two-numbers-in-an-array |
python |
Medium |
| 422 |
valid-word-square |
python |
Easy |
| 423 |
reconstruct-original-digits-from-english |
python |
Medium |
| 424 |
longest-repeating-character-replacement |
python |
Medium |
| 425 |
word-squares |
python |
hard |
| 432 |
all-oone-data-structure |
python |
hard |
| 434 |
number-of-segments-in-a-string |
python |
Easy |
| 435 |
non-overlapping-intervals |
python |
Medium |
| 436 |
find-right-interval |
python |
Medium |
| 437 |
path-sum-iii |
python |
Easy |
| 438 |
find-all-anagrams-in-a-string |
python |
Easy |
| 439 |
ternary-expression-parser |
python |
Medium |
| 440 |
k-th-smallest-in-lexicographical-order |
python |
hard |
| 441 |
arranging-coins |
python |
Easy |
| 442 |
find-all-duplicates-in-an-array |
python |
Medium |
| 444 |
sequence-reconstruction |
python |
Medium |
| 445 |
add-two-numbers-ii |
python |
Medium |
| 446 |
arithmetic-slices-ii-subsequence |
python |
hard |
| 447 |
number-of-boomerangs |
python |
Easy |
| 448 |
find-all-numbers-disappeared-in-an-array |
python |
Easy |
| 449 |
serialize-and-deserialize-bst |
python |
Medium |
| 450 |
delete-node-in-a-bst |
python |
Medium |
| 451 |
sort-characters-by-frequency |
python |
Medium |
| 452 |
minimum-number-of-arrows-to-burst-balloons |
python |
Medium |
| 453 |
minimum-moves-to-equal-array-elements |
python |
Easy |
| 454 |
4sum-ii |
python |
Medium |
| 455 |
assign-cookies |
python |
Easy |
| 456 |
132-pattern |
python |
Medium |
| 459 |
repeated-substring-pattern |
python |
Easy |
| 460 |
lfu-cache |
python |
hard |
| 461 |
hamming-distance |
python |
Easy |
| 462 |
minimum-moves-to-equal-array-elements-ii |
python |
Medium |
| 463 |
island-perimeter |
python |
Easy |
| 464 |
can-i-win |
python |
Medium |
| 465 |
optimal-account-balancing |
python |
hard |
| 466 |
count-the-repetitions |
python |
hard |
| 467 |
unique-substrings-in-wraparound-string |
python |
Medium |
| 468 |
validate-ip-address |
python |
Medium |
| 469 |
convex-polygon |
python |
Medium |
| 471 |
encode-string-with-shortest-length |
python |
hard |
| 472 |
concatenated-words |
python |
hard |
| 473 |
matchsticks-to-square |
python |
Medium |
| 474 |
ones-and-zeroes |
python |
Medium |
| 475 |
heaters |
python |
Easy |
| 476 |
number-complement |
python |
Easy |
| 477 |
total-hamming-distance |
python |
Medium |
| 480 |
sliding-window-median |
python |
hard |
| 481 |
magical-string |
python |
Medium |
| 482 |
license-key-formatting |
python |
Medium |
| 483 |
smallest-good-base |
python |
hard |
| 484 |
find-permutation |
python |
Medium |
| 485 |
max-consecutive-ones |
python |
Easy |
| 486 |
predict-the-winner |
python |
Medium |
| 487 |
max-consecutive-ones-ii |
python |
Medium |
| 488 |
zuma-game |
python |
hard |
| 490 |
the-maze |
python |
Medium |
| 491 |
increasing-subsequences |
python |
Medium |
| 492 |
construct-the-rectangle |
python |
Easy |
| 493 |
reverse-pairs |
python |
hard |
| 494 |
target-sum |
python |
Medium |
| 495 |
teemo-attacking |
python |
Medium |
| 496 |
next-greater-element-i |
python |
Easy |
| 498 |
diagonal-traverse |
python |
Medium |
| 499 |
the-maze-iii |
python |
hard |
| 500 |
keyboard-row |
python |
Easy |
| 501 |
find-mode-in-binary-search-tree |
python |
Easy |
| 502 |
ipo |
python |
hard |
| 503 |
next-greater-element-ii |
python |
Medium |
| 504 |
base-7 |
python |
Easy |
| 505 |
the-maze-ii |
python |
Medium |
| 506 |
relative-ranks |
python |
Easy |
| 507 |
perfect-number |
python |
Easy |
| 508 |
most-frequent-subtree-sum |
python |
Medium |
| 513 |
find-bottom-left-tree-value |
python |
Medium |
| 514 |
freedom-trail |
python |
hard |
| 515 |
find-largest-value-in-each-tree-row |
python |
Medium |
| 516 |
longest-palindromic-subsequence |
python |
Medium |
| 517 |
super-washing-machines |
python |
hard |
| 520 |
detect-capital |
python |
Easy |
| 521 |
longest-uncommon-subsequence-i |
python |
Easy |
| 522 |
longest-uncommon-subsequence-ii |
python |
Medium |
| 523 |
continuous-subarray-sum |
python |
Medium |
| 524 |
longest-word-in-dictionary-through-deleting |
python |
Medium |
| 525 |
contiguous-array |
python |
Medium |
| 526 |
beautiful-arrangement |
python |
Medium |
| 527 |
word-abbreviation |
python |
hard |
| 529 |
minesweeper |
python |
Medium |
| 530 |
minimum-absolute-difference-in-bst |
python |
Easy |
| 531 |
lonely-pixel-i |
python |
Medium |
| 532 |
k-diff-pairs-in-an-array |
python |
Easy |
| 533 |
lonely-pixel-ii |
python |
Medium |
| 535 |
encode-and-decode-tinyurl |
python |
Medium |
| 536 |
construct-binary-tree-from-string |
python |
Medium |
| 537 |
complex-number-multiplication |
python |
Medium |
| 538 |
convert-bst-to-greater-tree |
python |
Medium |
| 539 |
minimum-time-difference |
python |
Medium |
| 541 |
reverse-string-ii |
python |
Easy |
| 542 |
01-matrix |
python |
Medium |
| 543 |
diameter-of-binary-tree |
python |
Easy |
| 544 |
output-contest-matches |
python |
Medium |
| 545 |
boundary-of-binary-tree |
python |
Medium |
| 546 |
remove-boxes |
python |
hard |
| 547 |
friend-circles |
python |
Medium |
| 548 |
split-array-with-equal-sum |
python |
Medium |
| 549 |
binary-tree-longest-consecutive-sequence-ii |
python |
Medium |
| 551 |
student-attendance-record-i |
python |
Easy |
| 552 |
student-attendance-record-ii |
python |
hard |
| 553 |
optimal-division |
python |
Medium |
| 554 |
brick-wall |
python |
Medium |
| 555 |
split-concatenated-strings |
python |
Medium |
| 556 |
next-greater-element-iii |
python |
Medium |
| 557 |
reverse-words-in-a-string-iii |
python |
Easy |
| 560 |
subarray-sum-equals-k |
python |
Medium |
| 561 |
array-partition-i |
python |
Easy |
| 562 |
longest-line-of-consecutive-one-in-matrix |
python |
Medium |
| 563 |
binary-tree-tilt |
python |
Easy |
| 564 |
find-the-closest-palindrome |
python |
hard |
| 565 |
array-nesting |
python |
Medium |
| 566 |
reshape-the-matrix |
python |
Easy |
| 567 |
permutation-in-string |
python |
Medium |
| 568 |
maximum-vacation-days |
python |
hard |
| 572 |
subtree-of-another-tree |
python |
Easy |
| 573 |
squirrel-simulation |
python |
Medium |
| 575 |
distribute-candies |
python |
Easy |
| 576 |
out-of-boundary-paths |
python |
hard |
| 581 |
shortest-unsorted-continuous-subarray |
python |
Easy |
| 582 |
kill-process |
python |
Medium |
| 583 |
delete-operation-for-two-strings |
python |
Medium |
| 587 |
erect-the-fence |
python |
hard |
| 588 |
design-in-memory-file-system |
python |
hard |
| 591 |
tag-validator |
python |
hard |
| 592 |
fraction-addition-and-subtraction |
python |
Medium |
| 593 |
valid-square |
python |
Medium |
| 594 |
longest-harmonious-subsequence |
python |
Easy |
| 598 |
range-addition-ii |
python |
Easy |
| 599 |
minimum-index-sum-of-two-lists |
python |
Easy |
| 600 |
non-negative-integers-without-consecutive-ones |
python |
hard |
| 604 |
design-compressed-string-iterator |
python |
Easy |
| 605 |
can-place-flowers |
python |
Easy |
| 606 |
construct-string-from-binary-tree |
python |
Easy |
| 609 |
find-duplicate-file-in-system |
python |
Medium |
| 611 |
valid-triangle-number |
python |
Medium |
| 616 |
add-bold-tag-in-string |
python |
Medium |
| 617 |
merge-two-binary-trees |
python |
Easy |