| 347 |
Top K Frequent Elements |
JavaScript |
Explaination |
Medium |
| 345 |
Reverse Vowels of a String |
JavaScript |
Explaination |
Easy |
| 344 |
Reverse String |
JavaScript |
Explaination |
Easy |
| 343 |
Integer Break |
JavaScript |
Explaination |
Medium |
| 342 |
Power of Four |
JavaScript |
Explaination |
Easy |
| 341 |
Flatten Nested List Iterator |
JavaScript |
Explaination |
Medium |
| 339 |
Nested List Weight Sum |
📘 |
|
Easy |
| 338 |
Counting Bits |
JavaScript |
Explaination |
Medium |
| 337 |
House Robber III |
JavaScript |
Explaination |
Medium |
| 336 |
Palindrome Pairs |
|
|
|
| 335 |
Self Crossing |
JavaScript |
Explaination |
Medium |
| 334 |
Increasing Triplet Subsequence |
JavaScript |
Explaination |
Medium |
| 333 |
Largest BST Subtree |
📘 |
|
Medium |
| 332 |
Reconstruct Itinerary |
|
|
|
| 331 |
Verify Preorder Serialization of a Binary Tree |
|
|
|
| 330 |
Patching Array |
JavaScript |
Explaination |
Medium |
| 329 |
Longest Increasing Path in a Matrix |
|
|
|
| 328 |
Odd Even Linked List |
|
|
|
| 327 |
Count of Range Sum |
|
|
|
| 326 |
Power of Three |
JavaScript |
Explaination |
Easy |
| 325 |
Maximum Size Subarray Sum Equals k |
📘 |
|
Easy |
| 324 |
Wiggle Sort II |
|
|
|
| 323 |
Number of Connected Components in an Undirected Graph |
📘 |
|
Medium |
| 322 |
Coin Change |
JavaScript |
Explaination |
Medium |
| 321 |
Create Maximum Number |
|
|
|
| 320 |
Generalized Abbreviation |
📘 |
|
Medium |
| 319 |
Bulb Switcher |
JavaScript |
Explaination |
Medium |
| 318 |
Maximum Product of Word Lengths |
|
|
|
| 317 |
Shortest Distance from All Buildings |
📘 |
|
Hard |
| 316 |
Remove Duplicate Letters |
|
|
|
| 315 |
Count of Smaller Numbers After Self |
JavaScript |
Explaination |
Hard |
| 314 |
Binary Tree Vertical Order Traversal |
📘 |
|
Medium |
| 313 |
Super Ugly Number |
JavaScript |
Explaination |
Medium |
| 312 |
Burst Balloons |
|
|
|
| 311 |
Sparse Matrix Multiplication |
📘 |
|
Medium |
| 310 |
Minimum Height Trees |
|
|
|
| 309 |
Best Time to Buy and Sell Stock with Cooldown |
|
|
|
| 308 |
Range Sum Query 2D - Mutable |
📘 |
|
Hard |
| 307 |
Range Sum Query - Mutable |
JavaScript |
Explaination |
Medium |
| 306 |
Additive Number |
JavaScript |
Explaination |
Medium |
| 305 |
Number of Islands II |
📘 |
|
|
| 304 |
Range Sum Query 2D - Immutable |
JavaScript |
Explaination |
Medium |
| 303 |
Range Sum Query - Immutable |
JavaScript |
Explaination |
Easy |
| 302 |
Smallest Rectangle Enclosing Black Pixels |
📘 |
|
|
| 301 |
Remove Invalid Parentheses |
|
|
|
| 300 |
Longest Increasing Subsequence |
JavaScript |
Explaination |
Medium |
| 299 |
Bulls and Cows |
JavaScript |
Explaination |
Easy |
| 298 |
Binary Tree Longest Consecutive Sequence |
📘 |
|
|
| 297 |
Serialize and Deserialize Binary Tree |
|
|
|
| 296 |
Best Meeting Point |
📘 |
|
|
| 295 |
Find Median from Data Stream |
JavaScript |
Explaination |
Hard |
| 294 |
Flip Game II |
📘 |
|
|
| 293 |
Flip Game |
📘 |
|
|
| 292 |
Nim Game |
JavaScript |
Explaination |
Easy |
| 291 |
Word Pattern II |
📘 |
|
|
| 290 |
Word Pattern |
JavaScript |
Explaination |
Easy |
| 289 |
Game of Life |
JavaScript |
Explaination |
Medium |
| 288 |
Unique Word Abbreviation |
📘 |
|
|
| 287 |
Find the Duplicate Number |
JavaScript |
Explaination |
Hard |
| 286 |
Walls and Gates |
📘 |
|
|
| 285 |
Inorder Successor in BST |
📘 |
|
|
| 284 |
Peeking Iterator |
|
|
|
| 283 |
Move Zeroes |
JavaScript |
Explaination |
Easy |
| 282 |
Expression Add Operators |
|
|
|
| 281 |
Zigzag Iterator |
📘 |
|
|
| 280 |
Wiggle Sort |
📘 |
|
|
| 279 |
Perfect Squares |
JavaScript |
Explaination |
Medium |
| 278 |
First Bad Version |
JavaScript |
Explaination |
Easy |
| 277 |
Find the Celebrity |
📘 |
|
|
| 276 |
Paint Fence |
📘 |
|
|
| 275 |
H-Index II |
JavaScript |
Explaination |
Medium |
| 274 |
H-Index |
JavaScript |
Explaination |
Medium |
| 273 |
Integer to English Words |
|
|
|
| 272 |
Closest Binary Search Tree Value II |
📘 |
|
|
| 271 |
Encode and Decode Strings |
📘 |
|
|
| 270 |
Closest Binary Search Tree Value |
📘 |
|
|
| 269 |
Alien Dictionary |
📘 |
|
|
| 268 |
Missing Number |
JavaScript |
Explaination |
Medium |
| 267 |
Palindrome Permutation II |
📘 |
|
|
| 266 |
Palindrome Permutation |
📘 |
|
|
| 265 |
Paint House II |
📘 |
|
|
| 264 |
Ugly Number II |
JavaScript |
Explaination |
Medium |
| 263 |
Ugly Number |
JavaScript |
Explaination |
Easy |
| 261 |
Graph Valid Tree |
📘 |
|
|
| 260 |
Single Number III |
|
|
|
| 259 |
3Sum Smaller |
📘 |
|
|
| 258 |
Add Digits |
JavaScript |
Explaination |
Easy |
| 257 |
Binary Tree Paths |
JavaScript |
Explaination |
Easy |
| 256 |
Paint House) |
📘 |
|
|
| 255 |
Verify Preorder Sequence in Binary Search Tree |
📘 |
|
|
| 254 |
Factor Combinations |
📘 |
|
|
| 253 |
Meeting Rooms II |
📘 |
|
|
| 252 |
Meeting Rooms |
📘 |
|
|
| 251 |
Flatten 2D Vector |
📘 |
|
|
| 250 |
Count Univalue Subtrees |
📘 |
|
|
| 249 |
Group Shifted Strings |
📘 |
|
|
| 248 |
Strobogrammatic Number III |
📘 |
|
|
| 247 |
Strobogrammatic Number II |
📘 |
|
|
| 246 |
Strobogrammatic Number |
📘 |
|
|
| 245 |
Shortest Word Distance III |
📘 |
|
|
| 244 |
Shortest Word Distance II |
📘 |
|
|
| 243 |
Shortest Word Distance |
📘 |
|
|
| 242 |
Valid Anagram |
JavaScript |
Explaination |
Easy |
| 241 |
Different Ways to Add Parentheses |
|
|
|
| 240 |
Search a 2D Matrix II |
JavaScript |
Explaination |
Medium |
| 239 |
Sliding Window Maximum |
|
|
|
| 238 |
Product of Array Except Self |
|
|
|
| 237 |
Delete Node in a Linked List |
JavaScript |
Explaination |
Easy |
| 236 |
Lowest Common Ancestor of a Binary Tree |
|
|
|
| 235 |
Lowest Common Ancestor of a Binary Search Tree |
|
|
|
| 234 |
Palindrome Linked List |
JavaScript |
Explaination |
Easy |
| 233 |
Number of Digit One |
|
|
|
| 232 |
Implement Queue using Stacks |
JavaScript |
Explaination |
Easy |
| 231 |
Power of Two |
JavaScript |
Explaination |
Easy |
| 230 |
Kth Smallest Element in a BST |
|
|
|
| 229 |
Majority Element II |
|
|
|
| 228 |
Summary Ranges |
JavaScript |
Explaination |
Medium |
| 227 |
Basic Calculator II |
|
|
|
| 226 |
Invert Binary Tree |
JavaScript |
Explaination |
Easy |
| 225 |
Implement Stack using Queues |
JavaScript |
Explaination |
Easy |
| 224 |
Basic Calculator |
|
|
|
| 223 |
Rectangle Area |
JavaScript |
Explaination |
Easy |
| 222 |
Count Complete Tree Nodes |
|
|
|
| 221 |
Maximal Square |
|
|
|
| 220 |
|
|
|
|
| 219 |
|
|
|
|
| 218 |
|
|
|
|
| 217 |
|
|
|
|
| 216 |
|
|
|
|
| 215 |
Kth Largest Element in an Array |
JavaScript |
Explaination |
Medium |
| 214 |
Shortest Palindrome |
JavaScript |
Explaination |
Hard |
| 213 |
House Robber II |
|
|
|
| 212 |
Word Search II |
|
|
|
| 211 |
Add and Search Word - Data structure design |
|
|
|
| 210 |
Course Schedule II |
|
|
|
| 209 |
Minimum Size Subarray Sum |
|
|
|
| 208 |
Implement Trie (Prefix Tree) |
|
|
|
| 207 |
Course Schedule |
|
|
|
| 206 |
Reverse Linked List |
|
|
|
| 205 |
Isomorphic Strings |
JavaScript |
Explaination |
Easy |
| 204 |
Count Primes |
|
|
|
| 203 |
Remove Linked List Elements |
|
|
|
| 202 |
Happy Number |
JavaScript |
Explaination |
Easy |
| 201 |
Bitwise AND of Numbers Range |
|
|
|
| 200 |
Number of Islands |
JavaScript |
Explaination |
Medium |
| 199 |
Binary Tree Right Side View |
|
|
|
| 198 |
House Robber |
|
|
|
| 191 |
Number of 1 Bits |
|
|
|
| 190 |
Reverse Bits |
JavaScript |
Explaination |
Easy |
| 189 |
Rotate Array |
JavaScript |
Explaination |
Easy |
| 188 |
Best Time to Buy and Sell Stock IV |
|
|
|
| 187 |
Repeated DNA Sequences |
JavaScript |
Explaination |
Medium |
| 186 |
Reverse Words in a String II |
|
|
|
| 179 |
Largest Number |
JavaScript |
Explaination |
Medium |
| 174 |
Dungeon Game |
|
|
|
| 173 |
Binary Search Tree Iterator |
|
|
|
| 172 |
Factorial Trailing Zeroes |
JavaScript |
Explaination |
Easy |
| 171 |
Excel Sheet Column Number |
|
|
|
| 170 |
Two Sum III - Data structure design |
|
|
|
| 169 |
Majority Element |
JavaScript |
Explaination |
Easy |
| 168 |
Excel Sheet Column Title |
|
|
|
| 167 |
Two Sum II - Input array is sorted |
|
|
|
| 166 |
Fraction to Recurring Decimal |
|
|
|
| 165 |
Compare Version Numbers |
JavaScript |
Explaination |
Easy |
| 164 |
Maximum Gap |
JavaScript |
Explaination |
Hard |
| 163 |
Missing Ranges |
|
|
|
| 162 |
Find Peak Element |
JavaScript |
Explaination |
Medium |
| 161 |
One Edit Distance |
|
|
|
| 160 |
Intersection of Two Linked Lists |
|
|
|
| 159 |
Longest Substring with At Most Two Distinct Characters |
|
|
|
| 158 |
Read N Characters Given Read4 II - Call multiple times |
|
|
|
| 157 |
Read N Characters Given Read4 |
|
|
|
| 156 |
Binary Tree Upside Down |
|
|
|
| 155 |
Min Stack |
Not Support JavaScript |
|
|
| 154 |
Find Minimum in Rotated Sorted Array II |
|
|
|
| 153 |
Find Minimum in Rotated Sorted Array |
|
|
|
| 152 |
Maximum Product Subarray |
|
|
|
| 151 |
Reverse Words in a String |
|
|
|
| 150 |
Evaluate Reverse Polish Notation |
|
|
|
| 149 |
Max Points on a Line |
|
|
|
| 148 |
Sort List |
|
|
|
| 146 |
LRU Cache |
JavaScript |
Explaination |
Hard |
| 141 |
Linked List Cycle |
JavaScript |
Explaination |
Easy |
| 122 |
Best Time to Buy and Sell Stock II |
JavaScript |
Explaination |
Medium |
| 121 |
Best Time to Buy and Sell Stock |
JavaScript |
Explaination |
Easy |
| 65 |
Valid Number |
JavaScript |
Explaination |
Hard |
| 50 |
Pow(x, n) |
JavaScript |
Explaination |
Medium |
| 19 |
Remove Nth Node From End of List |
JavaScript |
Explaination |
Easy |
| 1 |
Two Sum |
JavaScript |
Explaination |
Easy |