| 1 |
Two Sum |
36% |
Easy |
|
| 2 |
Add Two Numbers |
28% |
Medium |
|
| 3 |
Longest Substring Without Repeating Characters |
24% |
Medium |
|
| 4 |
Median of Two Sorted Arrays |
22% |
Hard |
|
| 5 |
Longest Palindromic Substring |
25% |
Medium |
|
| 6 |
ZigZag Conversion |
27% |
Medium |
|
| 7 |
Reverse Integer |
24% |
Easy |
|
| 8 |
String to Integer (atoi) |
13% |
Medium |
|
| 9 |
Palindrome Number |
35% |
Easy |
|
| 10 |
Regular Expression Matching |
24% |
Hard |
❤ |
| 11 |
Container With Most Water |
36% |
Medium |
|
| 12 |
Integer to Roman |
45% |
Medium |
|
| 13 |
Roman to Integer |
47% |
Easy |
|
| 14 |
Longest Common Prefix |
31% |
Easy |
|
| 15 |
3Sum |
21% |
Medium |
|
| 16 |
3Sum Closest |
31% |
Medium |
|
| 17 |
Letter Combinations of a Phone Number |
35% |
Medium |
|
| 18 |
4Sum |
27% |
Medium |
|
| 19 |
Remove Nth Node From End of List |
34% |
Medium |
|
| 20 |
Valid Parentheses |
33% |
Easy |
|
| 21 |
Merge Two Sorted Lists |
39% |
Easy |
|
| 22 |
Generate Parentheses |
46% |
Medium |
❤ |
| 23 |
Merge k Sorted Lists |
27% |
Hard |
|
| 24 |
Swap Nodes in Pairs |
38% |
Medium |
❤ |
| 25 |
Reverse Nodes in k-Group |
31% |
Hard |
❤ |
| 26 |
Remove Duplicates from Sorted Array |
35% |
Easy |
❤ |
| 27 |
Remove Element |
40% |
Easy |
|
| 28 |
Implement strStr() |
28% |
Easy |
|
| 29 |
Divide Two Integers |
15% |
Medium |
|
| 30 |
Substring with Concatenation of All Words |
22% |
Hard |
❤ |
| 31 |
Next Permutation |
28% |
Medium |
❤ |
| 32 |
Longest Valid Parentheses |
23% |
Hard |
|
| 33 |
Search in Rotated Sorted Array |
32% |
Medium |
❤ |
| 34 |
Search for a Range |
31% |
Medium |
|
| 35 |
Search Insert Position |
39% |
Easy |
|
| 36 |
Valid Sudoku |
36% |
Medium |
❤ |
| 37 |
Sudoku Solver |
31% |
Hard |
❤ |
| 38 |
Count and Say |
36% |
Easy |
|
| 39 |
Combination Sum |
40% |
Medium |
|
| 40 |
Combination Sum II |
35% |
Medium |
|
| 41 |
First Missing Positive |
25% |
Hard |
|
| 42 |
Trapping Rain Water |
37% |
Hard |
|
| 43 |
Multiply Strings |
27% |
Medium |
|
| 44 |
Wildcard Matching |
20% |
Hard |
❤ |
| 45 |
Jump Game II |
26% |
Hard |
|
| 46 |
Permutations |
45% |
Medium |
|
| 47 |
Permutations II |
34% |
Medium |
|
| 48 |
Rotate Image |
40% |
Medium |
|
| 49 |
Group Anagrams |
37% |
Medium |
❤ |
| 50 |
Pow(x, n) |
26% |
Medium |
|
| 51 |
N-Queens |
32% |
Hard |
|
| 52 |
N-Queens II |
46% |
Hard |
|
| 53 |
Maximum Subarray |
40% |
Easy |
❤ |
| 54 |
Spiral Matrix |
26% |
Medium |
❤ |
| 55 |
Jump Game |
29% |
Medium |
|
| 56 |
Merge Intervals |
31% |
Medium |
❤ |
| 57 |
Insert Interval |
28% |
Hard |
|
| 58 |
Length of Last Word |
32% |
Easy |
|
| 59 |
Spiral Matrix II |
40% |
Medium |
❤ |
| 60 |
Permutation Sequence |
29% |
Medium |
|
| 61 |
Rotate List |
24% |
Medium |
❤ |
| 62 |
Unique Paths |
42% |
Medium |
❤ |
| 63 |
Unique Paths II |
32% |
Medium |
|
| 64 |
Minimum Path Sum |
39% |
Medium |
|
| 65 |
Valid Number |
12% |
Hard |
|
| 66 |
Plus One |
39% |
Easy |
|
| 67 |
Add Binary |
33% |
Easy |
|
| 68 |
Text Justification |
19% |
Hard |
|
| 69 |
Sqrt(x) |
28% |
Easy |
|
| 70 |
Climbing Stairs |
40% |
Easy |
|
| 71 |
Simplify Path |
26% |
Medium |
|
| 72 |
Edit Distance |
32% |
Hard |
❤ |
| 73 |
Set Matrix Zeroes |
36% |
Medium |
❤ |
| 74 |
Search a 2D Matrix |
34% |
Medium |
|
| 75 |
Sort Colors |
38% |
Medium |
❤ |
| 76 |
Minimum Window Substring |
26% |
Hard |
❤ |
| 77 |
Combinations |
40% |
Medium |
|
| 78 |
Subsets |
43% |
Medium |
❤ |
| 79 |
Word Search |
27% |
Medium |
|
| 80 |
Remove Duplicates from Sorted Array II |
36% |
Medium |
❤ |
| 81 |
Search in Rotated Sorted Array II |
32% |
Medium |
|
| 82 |
Remove Duplicates from Sorted List II |
29% |
Medium |
❤ |
| 83 |
Remove Duplicates from Sorted List |
40% |
Easy |
|
| 84 |
Largest Rectangle in Histogram |
27% |
Hard |
❤ |
| 85 |
Maximal Rectangle |
29% |
Hard |
❤ |
| 86 |
Partition List |
33% |
Medium |
|
| 87 |
Scramble String |
29% |
Hard |
❤ |
| 88 |
Merge Sorted Array |
32% |
Easy |
|
| 89 |
Gray Code |
41% |
Medium |
|
| 90 |
Subsets II |
37% |
Medium |
❤ |
| 91 |
Decode Ways |
20% |
Medium |
❤ |
| 92 |
Reverse Linked List II |
31% |
Medium |
|
| 93 |
Restore IP Addresses |
28% |
Medium |
❤ |
| 94 |
Binary Tree Inorder Traversal |
48% |
Medium |
|
| 95 |
Unique Binary Search Trees II |
31% |
Medium |
❤ |
| 96 |
Unique Binary Search Trees |
41% |
Medium |
|
| 97 |
Interleaving String |
24% |
Hard |
❤ |
| 98 |
Validate Binary Search Tree |
23% |
Medium |
❤ |
| 99 |
Recover Binary Search Tree |
30% |
Hard |
❤ |
| 100 |
Same Tree |
47% |
Easy |
|
| 101 |
Symmetric Tree |
39% |
Easy |
❤ |
| 102 |
Binary Tree Level Order Traversal |
41% |
Medium |
|
| 103 |
Binary Tree Zigzag Level Order Traversal |
35% |
Medium |
|
| 104 |
Maximum Depth of Binary Tree |
53% |
Easy |
|
| 105 |
Construct Binary Tree from Preorder and Inorder Traversal |
33% |
Medium |
❤ |
| 106 |
Construct Binary Tree from Inorder and Postorder Traversal |
32% |
Medium |
❤ |
| 107 |
Binary Tree Level Order Traversal II |
41% |
Easy |
|
| 108 |
Convert Sorted Array to Binary Search Tree |
43% |
Easy |
|
| 109 |
Convert Sorted List to Binary Search Tree |
34% |
Medium |
|
| 110 |
Balanced Binary Tree |
38% |
Easy |
|
| 111 |
Minimum Depth of Binary Tree |
33% |
Easy |
|
| 112 |
Path Sum |
34% |
Easy |
|
| 113 |
Path Sum II |
34% |
Medium |
|
| 114 |
Flatten Binary Tree to Linked List |
36% |
Medium |
❤ |
| 115 |
Distinct Subsequences |
31% |
Hard |
❤ |
| 118 |
Pascal's Triangle |
39% |
Easy |
|
| 119 |
Pascal's Triangle II |
37% |
Easy |
|
| 120 |
Triangle |
34% |
Medium |
❤ |
| 121 |
Best Time to Buy and Sell Stock |
42% |
Easy |
|
| 122 |
Best Time to Buy and Sell Stock II |
47% |
Easy |
|
| 123 |
Best Time to Buy and Sell Stock III |
30% |
Hard |
|
| 124 |
Binary Tree Maximum Path Sum |
26% |
Hard |
❤ |
| 125 |
Valid Palindrome |
26% |
Easy |
|
| 126 |
Word Ladder II |
14% |
Hard |
❤ |
| 127 |
Word Ladder |
19% |
Medium |
❤ |
| 128 |
Longest Consecutive Sequence |
37% |
Hard |
|
| 129 |
Sum Root to Leaf Numbers |
37% |
Medium |
|
| 130 |
Surrounded Regions |
19% |
Medium |
❤ |
| 131 |
Palindrome Partitioning |
34% |
Medium |
❤ |
| 132 |
Palindrome Partitioning II |
24% |
Hard |
❤ |
| 134 |
Gas Station |
29% |
Medium |
❤ |
| 135 |
Candy |
25% |
Hard |
|
| 136 |
Single Number |
55% |
Easy |
|
| 137 |
Single Number II |
42% |
Medium |
❤ |
| 139 |
Word Break |
31% |
Medium |
❤ |
| 140 |
Word Break II |
24% |
Hard |
❤ |
| 143 |
Reorder List |
26% |
Medium |
❤ |
| 144 |
Binary Tree Preorder Traversal |
46% |
Medium |
❤ |
| 145 |
Binary Tree Postorder Traversal |
41% |
Hard |
|
| 146 |
LRU Cache |
19% |
Hard |
❤ |
| 147 |
Insertion Sort List |
33% |
Medium |
❤ |
| 148 |
Sort List |
29% |
Medium |
❤ |
| 149 |
Max Points on a Line |
15% |
Hard |
❤ |
| 150 |
Evaluate Reverse Polish Notation |
27% |
Medium |
|
| 152 |
Maximum Product Subarray |
26% |
Medium |
❤ |
| 153 |
Find Minimum in Rotated Sorted Array |
40% |
Medium |
|
| 154 |
Find Minimum in Rotated Sorted Array II |
37% |
Hard |
|
| 155 |
Min Stack |
30% |
Easy |
|
| 162 |
Find Peak Element |
38% |
Medium |
|
| 164 |
Maximum Gap |
29% |
Hard |
|
| 165 |
Compare Version Numbers |
20% |
Medium |
|
| 166 |
Fraction to Recurring Decimal |
17% |
Medium |
❤ |
| 167 |
Two Sum II - Input array is sorted |
47% |
Easy |
|
| 168 |
Excel Sheet Column Title |
26% |
Easy |
❤ |
| 169 |
Majority Element |
47% |
Easy |
❤ |
| 171 |
Excel Sheet Column Number |
48% |
Easy |
|
| 172 |
Factorial Trailing Zeroes |
36% |
Easy |
|
| 174 |
Dungeon Game |
23% |
Hard |
❤ |
| 179 |
Largest Number |
23% |
Medium |
❤ |
| 187 |
Repeated DNA Sequences |
32% |
Medium |
|
| 188 |
Best Time to Buy and Sell Stock IV |
24% |
Hard |
❤ |
| 189 |
Rotate Array |
25% |
Easy |
|
| 198 |
House Robber |
39% |
Easy |
❤ |
| 199 |
Binary Tree Right Side View |
41% |
Medium |
|
| 200 |
Number of Islands |
35% |
Medium |
|
| 201 |
Bitwise AND of Numbers Range |
34% |
Medium |
❤ |
| 202 |
Happy Number |
41% |
Easy |
|
| 203 |
Remove Linked List Elements |
33% |
Easy |
|
| 204 |
Count Primes |
26% |
Easy |
❤ |
| 205 |
Isomorphic Strings |
34% |
Easy |
❤ |
| 206 |
Reverse Linked List |
46% |
Easy |
|
| 207 |
Course Schedule |
33% |
Medium |
❤ |
| 208 |
Implement Trie (Prefix Tree) |
30% |
Medium |
❤ |
| 209 |
Minimum Size Subarray Sum |
31% |
Medium |
|
| 210 |
Course Schedule II |
29% |
Medium |
|
| 211 |
Add and Search Word - Data structure design |
24% |
Medium |
❤ |
| 212 |
Word Search II |
24% |
Hard |
❤ |
| 213 |
House Robber II |
34% |
Medium |
|
| 214 |
Shortest Palindrome |
24% |
Hard |
❤ |
| 215 |
Kth Largest Element in an Array |
40% |
Medium |
❤ |
| 216 |
Combination Sum III |
46% |
Medium |
|
| 217 |
Contains Duplicate |
46% |
Easy |
|
| 218 |
The Skyline Problem |
28% |
Hard |
❤ |
| 219 |
Contains Duplicate II |
32% |
Easy |
|
| 220 |
Contains Duplicate III |
18% |
Medium |
❤ |
| 221 |
Maximal Square |
29% |
Medium |
❤ |
| 223 |
Rectangle Area |
33% |
Medium |
|
| 224 |
Basic Calculator |
28% |
Hard |
|
| 225 |
Implement Stack using Queues |
33% |
Easy |
|
| 226 |
Invert Binary Tree |
52% |
Easy |
|
| 227 |
Basic Calculator II |
29% |
Medium |
|
| 228 |
Summary Ranges |
31% |
Medium |
|
| 229 |
Majority Element II |
28% |
Medium |
❤ |
| 230 |
Kth Smallest Element in a BST |
44% |
Medium |
|
| 231 |
Power of Two |
40% |
Easy |
|
| 232 |
Implement Queue using Stacks |
37% |
Easy |
|
| 233 |
Number of Digit One |
28% |
Hard |
❤ |
| 234 |
Palindrome Linked List |
33% |
Easy |
|
| 238 |
Product of Array Except Self |
50% |
Medium |
|
| 239 |
Sliding Window Maximum |
33% |
Hard |
❤ |
| 240 |
Search a 2D Matrix II |
38% |
Medium |
❤ |
| 241 |
Different Ways to Add Parentheses |
45% |
Medium |
|
| 242 |
Valid Anagram |
47% |
Easy |
|
| 257 |
Binary Tree Paths |
40% |
Easy |
|
| 258 |
Add Digits |
51% |
Easy |
|
| 260 |
Single Number III |
52% |
Medium |
❤ |
| 263 |
Ugly Number |
39% |
Easy |
|
| 264 |
Ugly Number II |
33% |
Medium |
❤ |
| 268 |
Missing Number |
44% |
Easy |
|
| 273 |
Integer to English Words |
22% |
Hard |
❤ |
| 274 |
H-Index |
33% |
Medium |
|
| 275 |
H-Index II |
34% |
Medium |
❤ |
| 279 |
Perfect Squares |
37% |
Medium |
❤ |
| 282 |
Expression Add Operators |
30% |
Hard |
❤ |
| 283 |
Move Zeroes |
51% |
Easy |
|
| 287 |
Find the Duplicate Number |
43% |
Medium |
❤ |
| 289 |
Game of Life |
37% |
Medium |
❤ |
| 290 |
Word Pattern |
33% |
Easy |
|
| 292 |
Nim Game |
55% |
Easy |
❤ |
| 295 |
Find Median from Data Stream |
28% |
Hard |
❤ |
| 299 |
Bulls and Cows |
35% |
Medium |
|
| 300 |
Longest Increasing Subsequence |
38% |
Medium |
❤ |
| 301 |
Remove Invalid Parentheses |
35% |
Hard |
❤ |
| 303 |
Range Sum Query - Immutable |
31% |
Easy |
|
| 304 |
Range Sum Query 2D - Immutable |
26% |
Medium |
|
| 306 |
Additive Number |
27% |
Medium |
|
| 307 |
Range Sum Query - Mutable |
21% |
Medium |
|
| 309 |
Best Time to Buy and Sell Stock with Cooldown |
41% |
Medium |
❤ |
| 310 |
Minimum Height Trees |
28% |
Medium |
|
| 312 |
Burst Balloons |
43% |
Hard |
❤ |
| 313 |
Super Ugly Number |
38% |
Medium |
❤ |
| 315 |
Count of Smaller Numbers After Self |
34% |
Hard |
❤ |
| 316 |
Remove Duplicate Letters |
30% |
Hard |
❤ |
| 318 |
Maximum Product of Word Lengths |
45% |
Medium |
❤ |
| 319 |
Bulb Switcher |
42% |
Medium |
❤ |
| 321 |
Create Maximum Number |
24% |
Hard |
❤ |
| 322 |
Coin Change |
26% |
Medium |
❤ |
| 324 |
Wiggle Sort II |
26% |
Medium |
|
| 326 |
Power of Three |
40% |
Easy |
❤ |
| 327 |
Count of Range Sum |
30% |
Hard |
❤ |
| 328 |
Odd Even Linked List |
44% |
Medium |
❤ |
| 329 |
Longest Increasing Path in a Matrix |
37% |
Hard |
❤ |
| 330 |
Patching Array |
32% |
Hard |
|
| 331 |
Verify Preorder Serialization of a Binary Tree |
36% |
Medium |
❤ |
| 332 |
Reconstruct Itinerary |
29% |
Medium |
❤ |
| 334 |
Increasing Triplet Subsequence |
40% |
Medium |
❤ |
| 335 |
Self Crossing |
25% |
Hard |
|
| 336 |
Palindrome Pairs |
26% |
Hard |
❤ |
| 337 |
House Robber III |
44% |
Medium |
❤ |
| 338 |
Counting Bits |
61% |
Medium |
|
| 342 |
Power of Four |
38% |
Easy |
|
| 343 |
Integer Break |
46% |
Medium |
|
| 344 |
Reverse String |
59% |
Easy |
|
| 345 |
Reverse Vowels of a String |
38% |
Easy |
|
| 347 |
Top K Frequent Elements |
49% |
Medium |
|
| 349 |
Intersection of Two Arrays |
47% |
Easy |
|
| 350 |
Intersection of Two Arrays II |
44% |
Easy |
❤ |
| 352 |
Data Stream as Disjoint Intervals |
40% |
Hard |
|
| 354 |
Russian Doll Envelopes |
32% |
Hard |
❤ |
| 355 |
Design Twitter |
25% |
Medium |
❤ |
| 357 |
Count Numbers with Unique Digits |
46% |
Medium |
❤ |
| 363 |
Max Sum of Rectangle No Larger Than K |
33% |
Hard |
❤ |
| 365 |
Water and Jug Problem |
27% |
Medium |
❤ |
| 367 |
Valid Perfect Square |
38% |
Easy |
|
| 368 |
Largest Divisible Subset |
33% |
Medium |
❤ |
| 371 |
Sum of Two Integers |
51% |
Easy |
❤ |
| 372 |
Super Pow |
34% |
Medium |
|
| 373 |
Find K Pairs with Smallest Sums |
31% |
Medium |
❤ |
| 375 |
Guess Number Higher or Lower II |
36% |
Medium |
|
| 376 |
Wiggle Subsequence |
36% |
Medium |
❤ |
| 377 |
Combination Sum IV |
42% |
Medium |
|
| 378 |
Kth Smallest Element in a Sorted Matrix |
45% |
Medium |
❤ |
| 380 |
Insert Delete GetRandom O(1) |
39% |
Medium |
❤ |
| 381 |
Insert Delete GetRandom O(1) - Duplicates allowed |
29% |
Hard |
❤ |
| 382 |
Linked List Random Node |
47% |
Medium |
|
| 383 |
Ransom Note |
47% |
Easy |
|
| 384 |
Shuffle an Array |
47% |
Medium |
❤ |
| 385 |
Mini Parser |
30% |
Medium |
❤ |
| 387 |
First Unique Character in a String |
47% |
Easy |
|
| 388 |
Longest Absolute File Path |
37% |
Medium |
|
| 389 |
Find the Difference |
51% |
Easy |
|
| 390 |
Elimination Game |
42% |
Medium |
❤ |
| 391 |
Perfect Rectangle |
27% |
Hard |
|
| 392 |
Is Subsequence |
44% |
Medium |
❤ |
| 393 |
UTF-8 Validation |
34% |
Medium |
❤ |
| 394 |
Decode String |
41% |
Medium |
|
| 395 |
Longest Substring with At Least K Repeating Characters |
35% |
Medium |
|
| 396 |
Rotate Function |
33% |
Medium |
❤ |
| 397 |
Integer Replacement |
30% |
Medium |
❤ |
| 398 |
Random Pick Index |
44% |
Medium |
|
| 399 |
Evaluate Division |
41% |
Medium |
❤ |
| 400 |
Nth Digit |
30% |
Easy |
❤ |
| 401 |
Binary Watch |
44% |
Easy |
|
| 402 |
Remove K Digits |
26% |
Medium |
❤ |
| 403 |
Frog Jump |
32% |
Hard |
❤ |
| 404 |
Sum of Left Leaves |
47% |
Easy |
|
| 405 |
Convert a Number to Hexadecimal |
41% |
Easy |
|
| 406 |
Queue Reconstruction by Height |
56% |
Medium |
❤ |
| 407 |
Trapping Rain Water II |
37% |
Hard |
|
| 409 |
Longest Palindrome |
45% |
Easy |
|
| 410 |
Split Array Largest Sum |
38% |
Hard |
|
| 412 |
Fizz Buzz |
58% |
Easy |
|
| 413 |
Arithmetic Slices |
54% |
Medium |
|
| 414 |
Third Maximum Number |
27% |
Easy |
|
| 415 |
Add Strings |
41% |
Easy |
|
| 416 |
Partition Equal Subset Sum |
39% |
Medium |
❤ |
| 417 |
Pacific Atlantic Water Flow |
34% |
Medium |
|
| 419 |
Battleships in a Board |
62% |
Medium |
|
| 420 |
Strong Password Checker |
20% |
Hard |
❤ |
| 421 |
Maximum XOR of Two Numbers in an Array |
47% |
Medium |
❤ |
| 423 |
Reconstruct Original Digits from English |
44% |
Medium |
|
| 424 |
Longest Repeating Character Replacement |
42% |
Medium |
❤ |
| 432 |
All O`one Data Structure |
28% |
Hard |
❤ |
| 434 |
Number of Segments in a String |
36% |
Easy |
|
| 435 |
Non-overlapping Intervals |
41% |
Medium |
❤ |
| 436 |
Find Right Interval |
41% |
Medium |
|
| 437 |
Path Sum III |
40% |
Easy |
❤ |
| 438 |
Find All Anagrams in a String |
33% |
Easy |
|
| 440 |
K-th Smallest in Lexicographical Order |
25% |
Hard |
❤ |
| 441 |
Arranging Coins |
36% |
Easy |
|
| 442 |
Find All Duplicates in an Array |
56% |
Medium |
|
| 443 |
String Compression |
36% |
Easy |
❤ |
| 445 |
Add Two Numbers II |
45% |
Medium |
❤ |
| 446 |
Arithmetic Slices II - Subsequence |
27% |
Hard |
❤ |
| 447 |
Number of Boomerangs |
46% |
Easy |
|
| 448 |
Find All Numbers Disappeared in an Array |
51% |
Easy |
|
| 450 |
Delete Node in a BST |
37% |
Medium |
❤ |
| 451 |
Sort Characters By Frequency |
51% |
Medium |
|
| 452 |
Minimum Number of Arrows to Burst Balloons |
44% |
Medium |
|
| 453 |
Minimum Moves to Equal Array Elements |
47% |
Easy |
|
| 454 |
4Sum II |
47% |
Medium |
|
| 455 |
Assign Cookies |
47% |
Easy |
|
| 456 |
132 Pattern |
28% |
Medium |
❤ |
| 459 |
Repeated Substring Pattern |
38% |
Easy |
❤ |
| 460 |
LFU Cache |
24% |
Hard |
|
| 461 |
Hamming Distance |
69% |
Easy |
|
| 462 |
Minimum Moves to Equal Array Elements II |
51% |
Medium |
|
| 463 |
Island Perimeter |
57% |
Easy |
|
| 464 |
Can I Win |
25% |
Medium |
❤ |
| 466 |
Count The Repetitions |
27% |
Hard |
❤ |
| 467 |
Unique Substrings in Wraparound String |
33% |
Medium |
❤ |
| 468 |
Validate IP Address |
20% |
Medium |
|
| 472 |
Concatenated Words |
30% |
Hard |
|
| 473 |
Matchsticks to Square |
35% |
Medium |
❤ |
| 474 |
Ones and Zeroes |
39% |
Medium |
|
| 475 |
Heaters |
29% |
Easy |
|
| 476 |
Number Complement |
60% |
Easy |
|
| 477 |
Total Hamming Distance |
47% |
Medium |
❤ |
| 479 |
Largest Palindrome Product |
24% |
Easy |
|
| 480 |
Sliding Window Median |
31% |
Hard |
❤ |
| 481 |
Magical String |
45% |
Medium |
|
| 482 |
License Key Formatting |
40% |
Easy |
|
| 483 |
Smallest Good Base |
33% |
Hard |
❤ |
| 485 |
Max Consecutive Ones |
54% |
Easy |
|
| 486 |
Predict the Winner |
45% |
Medium |
|
| 488 |
Zuma Game |
37% |
Hard |
❤ |
| 491 |
Increasing Subsequences |
39% |
Medium |
❤ |
| 492 |
Construct the Rectangle |
48% |
Easy |
❤ |
| 493 |
Reverse Pairs |
21% |
Hard |
|
| 494 |
Target Sum |
43% |
Medium |
❤ |
| 495 |
Teemo Attacking |
51% |
Medium |
|
| 496 |
Next Greater Element I |
56% |
Easy |
|
| 498 |
Diagonal Traverse |
46% |
Medium |
|
| 500 |
Keyboard Row |
59% |
Easy |
|
| 501 |
Find Mode in Binary Search Tree |
37% |
Easy |
❤ |
| 502 |
IPO |
36% |
Hard |
|
| 503 |
Next Greater Element II |
47% |
Medium |
❤ |
| 504 |
Base 7 |
44% |
Easy |
|
| 506 |
Relative Ranks |
46% |
Easy |
|
| 507 |
Perfect Number |
33% |
Easy |
|
| 508 |
Most Frequent Subtree Sum |
52% |
Medium |
|
| 513 |
Find Bottom Left Tree Value |
56% |
Medium |
|
| 514 |
Freedom Trail |
39% |
Hard |
|
| 515 |
Find Largest Value in Each Tree Row |
55% |
Medium |
|
| 516 |
Longest Palindromic Subsequence |
42% |
Medium |
❤ |
| 517 |
Super Washing Machines |
36% |
Hard |
❤ |
| 520 |
Detect Capital |
52% |
Easy |
|
| 521 |
Longest Uncommon Subsequence I |
55% |
Easy |
|
| 522 |
Longest Uncommon Subsequence II |
31% |
Medium |
|
| 523 |
Continuous Subarray Sum |
23% |
Medium |
❤ |
| 524 |
Longest Word in Dictionary through Deleting |
43% |
Medium |
|
| 525 |
Contiguous Array |
41% |
Medium |
❤ |
| 526 |
Beautiful Arrangement |
53% |
Medium |
❤ |
| 529 |
Minesweeper |
49% |
Medium |
|
| 530 |
Minimum Absolute Difference in BST |
47% |
Easy |
❤ |
| 532 |
K-diff Pairs in an Array |
28% |
Easy |
|
| 537 |
Complex Number Multiplication |
63% |
Medium |
|
| 538 |
Convert BST to Greater Tree |
49% |
Easy |
|
| 539 |
Minimum Time Difference |
46% |
Medium |
|
| 540 |
Single Element in a Sorted Array |
56% |
Medium |
|
| 541 |
Reverse String II |
43% |
Easy |
|
| 542 |
01 Matrix |
32% |
Medium |
❤ |
| 543 |
Diameter of Binary Tree |
44% |
Easy |
|
| 546 |
Remove Boxes |
35% |
Hard |
❤ |
| 547 |
Friend Circles |
49% |
Medium |
❤ |
| 551 |
Student Attendance Record I |
44% |
Easy |
|
| 552 |
Student Attendance Record II |
31% |
Hard |
❤ |
| 553 |
Optimal Division |
55% |
Medium |
|
| 554 |
Brick Wall |
46% |
Medium |
|
| 556 |
Next Greater Element III |
29% |
Medium |
|
| 557 |
Reverse Words in a String III |
59% |
Easy |
|
| 560 |
Subarray Sum Equals K |
40% |
Medium |
❤ |
| 561 |
Array Partition I |
66% |
Easy |
|
| 563 |
Binary Tree Tilt |
47% |
Easy |
|
| 564 |
Find the Closest Palindrome |
17% |
Hard |
|
| 565 |
Array Nesting |
49% |
Medium |
|
| 566 |
Reshape the Matrix |
58% |
Easy |
|
| 567 |
Permutation in String |
36% |
Medium |
|
| 572 |
Subtree of Another Tree |
40% |
Easy |
❤ |
| 575 |
Distribute Candies |
58% |
Easy |
|
| 576 |
Out of Boundary Paths |
30% |
Medium |
❤ |
| 581 |
Shortest Unsorted Continuous Subarray |
29% |
Easy |
❤ |
| 583 |
Delete Operation for Two Strings |
44% |
Medium |
❤ |
| 587 |
Erect the Fence |
32% |
Hard |
❤ |
| 591 |
Tag Validator |
30% |
Hard |
|
| 592 |
Fraction Addition and Subtraction |
45% |
Medium |
|
| 593 |
Valid Square |
40% |
Medium |
|
| 594 |
Longest Harmonious Subsequence |
41% |
Easy |
|
| 598 |
Range Addition II |
48% |
Easy |
|
| 599 |
Minimum Index Sum of Two Lists |
46% |
Easy |
|
| 600 |
Non-negative Integers without Consecutive Ones |
31% |
Hard |
❤ |
| 605 |
Can Place Flowers |
30% |
Easy |
❤ |
| 606 |
Construct String from Binary Tree |
49% |
Easy |
|
| 609 |
Find Duplicate File in System |
52% |
Medium |
|
| 611 |
Valid Triangle Number |
42% |
Medium |
❤ |
| 617 |
Merge Two Binary Trees |
67% |
Easy |
|
| 621 |
Task Scheduler |
42% |
Medium |
❤ |
| 623 |
Add One Row to Tree |
46% |
Medium |
|
| 628 |
Maximum Product of Three Numbers |
45% |
Easy |
❤ |
| 629 |
K Inverse Pairs Array |
26% |
Hard |
|
| 630 |
Course Schedule III |
29% |
Hard |
❤ |
| 632 |
Smallest Range |
42% |
Hard |
|
| 633 |
Sum of Square Numbers |
32% |
Easy |
|
| 636 |
Exclusive Time of Functions |
44% |
Medium |
❤ |
| 637 |
Average of Levels in Binary Tree |
55% |
Easy |
|
| 638 |
Shopping Offers |
44% |
Medium |
❤ |
| 639 |
Decode Ways II |
24% |
Hard |
|
| 640 |
Solve the Equation |
38% |
Medium |
|
| 643 |
Maximum Average Subarray I |
37% |
Easy |
|
| 645 |
Set Mismatch |
40% |
Easy |
❤ |
| 646 |
Maximum Length of Pair Chain |
47% |
Medium |
|
| 647 |
Palindromic Substrings |
55% |
Medium |
❤ |
| 648 |
Replace Words |
47% |
Medium |
|
| 649 |
Dota2 Senate |
36% |
Medium |
❤ |
| 650 |
2 Keys Keyboard |
44% |
Medium |
|
| 652 |
Find Duplicate Subtrees |
37% |
Medium |
|
| 653 |
Two Sum IV - Input is a BST |
50% |
Easy |
|
| 654 |
Maximum Binary Tree |
69% |
Medium |
❤ |
| 655 |
Print Binary Tree |
49% |
Medium |
|
| 657 |
Judge Route Circle |
68% |
Easy |
|
| 658 |
Find K Closest Elements |
35% |
Medium |
❤ |
| 659 |
Split Array into Consecutive Subsequences |
36% |
Medium |
❤ |
| 661 |
Image Smoother |
46% |
Easy |
|
| 662 |
Maximum Width of Binary Tree |
38% |
Medium |
|
| 664 |
Strange Printer |
33% |
Hard |
❤ |
| 665 |
Non-decreasing Array |
20% |
Easy |
|
| 667 |
Beautiful Arrangement II |
51% |
Medium |
|
| 668 |
Kth Smallest Number in Multiplication Table |
38% |
Hard |
|
| 669 |
Trim a Binary Search Tree |
58% |
Easy |
|
| 670 |
Maximum Swap |
38% |
Medium |
❤ |
| 671 |
Second Minimum Node In a Binary Tree |
41% |
Easy |
|
| 672 |
Bulb Switcher II |
48% |
Medium |
|
| 673 |
Number of Longest Increasing Subsequence |
31% |
Medium |
❤ |
| 674 |
Longest Continuous Increasing Subsequence |
42% |
Easy |
|
| 675 |
Cut Off Trees for Golf Event |
27% |
Hard |
|
| 676 |
Implement Magic Dictionary |
49% |
Medium |
|
| 677 |
Map Sum Pairs |
52% |
Medium |
❤ |
| 678 |
Valid Parenthesis String |
29% |
Medium |
❤ |
| 679 |
24 Game |
38% |
Hard |
❤ |
| 680 |
Valid Palindrome II |
32% |
Easy |
|
| 682 |
Baseball Game |
58% |
Easy |
|
| 684 |
Redundant Connection |
41% |
Medium |
|
| 685 |
Redundant Connection II |
28% |
Hard |
❤ |
| 686 |
Repeated String Match |
34% |
Easy |
❤ |
| 687 |
Longest Univalue Path |
33% |
Easy |
|
| 688 |
Knight Probability in Chessboard |
39% |
Medium |
|
| 689 |
Maximum Sum of 3 Non-Overlapping Subarrays |
41% |
Hard |
|
| 691 |
Stickers to Spell Word |
34% |
Hard |
❤ |
| 692 |
Top K Frequent Words |
41% |
Medium |
|
| 693 |
Binary Number with Alternating Bits |
55% |
Easy |
|
| 695 |
Max Area of Island |
52% |
Easy |
❤ |
| 696 |
Count Binary Substrings |
51% |
Easy |
|
| 697 |
Degree of an Array |
46% |
Easy |
|
| 698 |
Partition to K Equal Sum Subsets |
37% |
Medium |
❤ |
| 699 |
Falling Squares |
37% |
Hard |
|
| 712 |
Minimum ASCII Delete Sum for Two Strings |
51% |
Medium |
❤ |
| 713 |
Subarray Product Less Than K |
33% |
Medium |
❤ |
| 714 |
Best Time to Buy and Sell Stock with Transaction Fee |
43% |
Medium |
❤ |
| 715 |
Range Module |
30% |
Hard |
|
| 717 |
1-bit and 2-bit Characters |
49% |
Easy |
|
| 718 |
Maximum Length of Repeated Subarray |
40% |
Medium |
❤ |
| 719 |
Find K-th Smallest Pair Distance |
26% |
Hard |
❤ |
| 720 |
Longest Word in Dictionary |
41% |
Easy |
|
| 721 |
Accounts Merge |
31% |
Medium |
❤ |
| 722 |
Remove Comments |
26% |
Medium |
❤ |
| 724 |
Find Pivot Index |
40% |
Easy |
|
| 725 |
Split Linked List in Parts |
48% |
Medium |
|
| 726 |
Number of Atoms |
44% |
Hard |
❤ |
| 728 |
Self Dividing Numbers |
67% |
Easy |
|
| 729 |
My Calendar I |
40% |
Medium |
|
| 730 |
Count Different Palindromic Subsequences |
34% |
Hard |
❤ |
| 731 |
My Calendar II |
36% |
Medium |
❤ |
| 732 |
My Calendar III |
54% |
Hard |
|
| 733 |
Flood Fill |
48% |
Easy |
|
| 735 |
Asteroid Collision |
37% |
Medium |
|
| 736 |
Parse Lisp Expression |
42% |
Hard |
❤ |
| 738 |
Monotone Increasing Digits |
41% |
Medium |
|
| 739 |
Daily Temperatures |
53% |
Medium |
❤ |
| 740 |
Delete and Earn |
42% |
Medium |
❤ |
| 741 |
Cherry Pickup |
22% |
Hard |
|
| 744 |
Network Delay Time |
33% |
Medium |
|
| 745 |
Find Smallest Letter Greater Than Target |
47% |
Easy |
|
| 746 |
Prefix and Suffix Search |
23% |
Hard |
|
| 747 |
Min Cost Climbing Stairs |
45% |
Easy |
|
| 748 |
Largest Number At Least Twice of Others |
46% |
Easy |
|
| 749 |
Shortest Completing Word |
54% |
Medium |
|
| 750 |
Contain Virus |
39% |
Hard |
|
| 753 |
Open the Lock |
37% |
Medium |
❤ |
| 754 |
Cracking the Safe |
39% |
Hard |
❤ |
| 755 |
Reach a Number |
23% |
Medium |
❤ |
| 756 |
Pour Water |
33% |
Medium |
|
| 757 |
Pyramid Transition Matrix |
40% |
Medium |
❤ |
| 759 |
Set Intersection Size At Least Two |
33% |
Hard |
|
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