。 |
8 |
String to Integer (atoi) |
|
13.9% |
Medium |
。 |
151 |
Reverse Words in a String |
|
15.7% |
Medium |
|
。 |
288 |
Unique Word Abbreviation |
|
15.8% |
Medium |
|
。 |
29 |
Divide Two Integers |
|
16.0% |
Medium |
|
。 |
166 |
Fraction to Recurring Decimal |
|
17.0% |
Medium |
|
。 |
130 |
Surrounded Regions |
|
17.8% |
Medium |
|
。 |
91 |
Decode Ways |
|
19.1% |
Medium |
|
。 |
307 |
Range Sum Query - Mutable |
|
19.1% |
Medium |
|
。 |
127 |
Word Ladder |
|
19.2% |
Medium |
|
。 |
220 |
Contains Duplicate III |
|
19.3% |
Medium |
|
。 |
165 |
Compare Version Numbers |
|
19.5% |
Medium |
|
。 |
444 |
Sequence Reconstruction |
|
19.7% |
Medium |
|
。 |
468 |
Validate IP Address |
|
20.3% |
Medium |
|
。 |
523 |
Continuous Subarray Sum |
|
20.7% |
Medium |
|
。 |
211 |
Add and Search Word - Data structure design |
|
20.9% |
Medium |
|
。 |
15 |
3Sum |
|
21.3% |
Medium |
|
。 |
179 |
Largest Number |
|
21.8% |
Medium |
|
。 |
98 |
Validate Binary Search Tree (好) |
|
22.6% |
Medium |
|
。 |
464 |
Can I Win(DP,有一定难度) |
|
23.4% |
Medium |
|
。 |
304 |
Range Sum Query 2D - Immutable |
|
23.4% |
Medium |
|
。 |
3 |
Longest Substring Without Repeating Characters |
|
23.9% |
Medium |
|
。 |
61 |
Rotate List |
|
24.1% |
Medium |
|
。 |
71 |
Simplify Path |
|
24.4% |
Medium |
|
|
152 |
Maximum Product Subarray |
|
24.8% |
Medium |
|
|
143 |
Reorder List |
|
24.9% |
Medium |
|
|
5 |
Longest Palindromic Substring |
|
24.9% |
Medium |
|
|
54 |
Spiral Matrix |
|
25.0% |
Medium |
|
|
355 |
Design Twitter |
|
25.0% |
Medium |
|
|
133 |
Clone Graph |
|
25.0% |
Medium |
|
|
324 |
Wiggle Sort II |
|
25.4% |
Medium |
|
|
79 |
Word Search |
|
25.7% |
Medium |
|
|
353 |
Design Snake Game |
|
25.9% |
Medium |
|
|
18 |
4Sum |
|
26.0% |
Medium |
|
|
163 |
Missing Ranges |
|
26.0% |
Medium |
|
|
402 |
Remove K Digits |
|
26.1% |
Medium |
|
|
322 |
Coin Change |
|
26.1% |
Medium |
|
|
6 |
ZigZag Conversion |
|
26.2% |
Medium |
|
|
93 |
Restore IP Addresses |
|
26.2% |
Medium |
|
|
43 |
Multiply Strings |
|
26.3% |
Medium |
|
|
150 |
Evaluate Reverse Polish Notation |
|
26.3% |
Medium |
|
|
271 |
Encode and Decode Strings |
|
26.3% |
Medium |
|
|
210 |
Course Schedule II |
|
26.3% |
Medium |
|
|
208 |
Implement Trie (Prefix Tree) |
|
26.4% |
Medium |
|
|
365 |
Water and Jug Problem |
|
26.5% |
Medium |
|
|
138 |
Copy List with Random Pointer |
|
26.6% |
Medium |
|
|
2 |
Add Two Numbers |
|
26.8% |
Medium |
|
|
50 |
Pow(x, n) |
|
26.8% |
Medium |
|
|
222 |
Count Complete Tree Nodes |
|
27.1% |
Medium |
|
|
306 |
Additive Number |
|
27.3% |
Medium |
|
|
418 |
Sentence Screen Fitting |
|
27.4% |
Medium |
|
|
60 |
Permutation Sequence |
|
27.5% |
Medium |
|
|
221 |
Maximal Square |
|
27.7% |
Medium |
|
|
148 |
Sort List |
|
27.7% |
Medium |
|
|
186 |
Reverse Words in a String II |
|
27.9% |
Medium |
|
|
456 |
132 Pattern |
|
28.0% |
Medium |
|
|
229 |
Majority Element II |
|
28.0% |
Medium |
|
|
332 |
Reconstruct Itinerary |
|
28.3% |
Medium |
|
|
31 |
Next Permutation |
|
28.3% |
Medium |
|
|
227 |
Basic Calculator II |
|
28.4% |
Medium |
|
|
310 |
Minimum Height Trees |
|
28.6% |
Medium |
|
|
228 |
Summary Ranges |
|
28.6% |
Medium |
|
|
139 |
Word Break |
|
28.8% |
Medium |
|
|
134 |
Gas Station |
|
28.8% |
Medium |
|
|
82 |
Remove Duplicates from Sorted List II |
|
28.8% |
Medium |
|
|
56 |
Merge Intervals |
|
28.9% |
Medium |
|
|
55 |
Jump Game |
|
29.3% |
Medium |
|
|
209 |
Minimum Size Subarray Sum |
|
29.3% |
Medium |
|
|
236 |
Lowest Common Ancestor of a Binary Tree |
|
29.5% |
Medium |
|
|
397 |
Integer Replacement |
|
29.5% |
Medium |
|
|
469 |
Convex Polygon |
|
29.8% |
Medium |
|
|
333 |
Largest BST Subtree |
|
30.0% |
Medium |
|
|
92 |
Reverse Linked List II |
|
30.0% |
Medium |
|
|
385 |
Mini Parser |
|
30.1% |
Medium |
|
|
187 |
Repeated DNA Sequences |
|
30.2% |
Medium |
|
|
373 |
Find K Pairs with Smallest Sums |
|
30.2% |
Medium |
|
|
356 |
Line Reflection |
|
30.3% |
Medium |
|
|
16 |
3Sum Closest |
|
30.7% |
Medium |
|
|
95 |
Unique Binary Search Trees II |
|
30.8% |
Medium |
|
|
161 |
One Edit Distance |
|
30.8% |
Medium |
|
|
379 |
Design Phone Directory |
|
30.8% |
Medium |
|
|
207 |
Course Schedule |
|
30.9% |
Medium |
|
|
396 |
Rotate Function |
|
30.9% |
Medium |
|
|
34 |
Search for a Range |
|
31.0% |
Medium |
|
|
142 |
Linked List Cycle II |
|
31.0% |
Medium |
|
|
105 |
Construct Binary Tree from Preorder and Inorder Traversal |
|
31.1% |
Medium |
|
|
63 |
Unique Paths II |
|
31.1% |
Medium |
|
|
467 |
Unique Substrings in Wraparound String |
|
31.2% |
Medium |
|
|
106 |
Construct Binary Tree from Inorder and Postorder Traversal |
|
31.2% |
Medium |
|
|
131 |
Palindrome Partitioning |
|
31.5% |
Medium |
|
|
47 |
Permutations II |
|
31.5% |
Medium |
|
|
267 |
Palindrome Permutation II |
|
31.5% |
Medium |
|
|
86 |
Partition List |
|
31.8% |
Medium |
|
|
264 |
Ugly Number II |
|
31.8% |
Medium |
|
|
40 |
Combination Sum II |
|
32.0% |
Medium |
|
|
113 |
Path Sum II |
|
32.1% |
Medium |
|
|
33 |
Search in Rotated Sorted Array |
|
32.1% |
Medium |
|
|
147 |
Insertion Sort List |
|
32.1% |
Medium |
|
|
223 |
Rectangle Area |
|
32.2% |
Medium |
|
|
525 |
Contiguous Array |
|
32.4% |
Medium |
|
|
19 |
Remove Nth Node From End of List |
|
32.5% |
Medium |
|
|
274 |
H-Index |
|
32.5% |
Medium |
|
|
49 |
Group Anagrams |
|
32.7% |
Medium |
|
|
120 |
Triangle |
|
32.8% |
Medium |
|
|
417 |
Pacific Atlantic Water Flow |
|
32.9% |
Medium |
|
|
81 |
Search in Rotated Sorted Array II |
|
32.9% |
Medium |
|
|
103 |
Binary Tree Zigzag Level Order Traversal |
|
32.9% |
Medium |
|
|
200 |
Number of Islands |
|
33.0% |
Medium |
|
|
109 |
Convert Sorted List to Binary Search Tree |
|
33.1% |
Medium |
|
|
17 |
Letter Combinations of a Phone Number |
|
33.1% |
Medium |
|
|
213 |
House Robber II |
|
33.3% |
Medium |
|
|
201 |
Bitwise AND of Numbers Range |
|
33.3% |
Medium |
|
|
368 |
Largest Divisible Subset |
|
33.5% |
Medium |
|
|
372 |
Super Pow |
|
33.5% |
Medium |
|
|
117 |
Populating Next Right Pointers in Each Node II |
|
33.6% |
Medium |
|
|
299 |
Bulls and Cows |
|
33.7% |
Medium |
|
|
275 |
H-Index II |
|
33.8% |
Medium |
|
|
114 |
Flatten Binary Tree to Linked List |
|
34.0% |
Medium |
|
|
473 |
Matchsticks to Square |
|
34.0% |
Medium |
|
|
36 |
Valid Sudoku |
|
34.4% |
Medium |
|
|
90 |
Subsets II |
|
34.6% |
Medium |
|
|
376 |
Wiggle Subsequence |
|
34.9% |
Medium |
|
|
393 |
UTF-8 Validation |
|
34.9% |
Medium |
|
|
505 |
The Maze II |
|
34.9% |
Medium |
|
|
80 |
Remove Duplicates from Sorted Array II |
|
35.2% |
Medium |
|
|
284 |
Peeking Iterator |
|
35.2% |
Medium |
|
|
450 |
Delete Node in a BST |
|
35.3% |
Medium |
|
|
74 |
Search a 2D Matrix |
|
35.4% |
Medium |
|
|
73 |
Set Matrix Zeroes |
|
35.4% |
Medium |
|
|
375 |
Guess Number Higher or Lower II |
|
35.5% |
Medium |
|
|
331 |
Verify Preorder Serialization of a Binary Tree |
|
35.5% |
Medium |
|
|
277 |
Find the Celebrity |
|
35.5% |
Medium |
|
|
388 |
Longest Absolute File Path |
|
35.5% |
Medium |
|
|
395 |
Longest Substring with At Least K Repeating Characters |
|
35.5% |
Medium |
|
|
129 |
Sum Root to Leaf Numbers |
|
35.5% |
Medium |
|
|
244 |
Shortest Word Distance II |
|
35.6% |
Medium |
|
|
279 |
Perfect Squares |
|
35.6% |
Medium |
|
|
314 |
Binary Tree Vertical Order Traversal |
|
36.0% |
Medium |
|
|
285 |
Inorder Successor in BST |
|
36.2% |
Medium |
|
|
11 |
Container With Most Water |
|
36.2% |
Medium |
|
|
162 |
Find Peak Element |
|
36.3% |
Medium |
|
|
289 |
Game of Life |
|
36.4% |
Medium |
|
|
39 |
Combination Sum |
|
36.6% |
Medium |
|
|
116 |
Populating Next Right Pointers in Each Node |
|
36.9% |
Medium |
|
|
75 |
Sort Colors |
|
37.0% |
Medium |
|
|
261 |
Graph Valid Tree |
|
37.0% |
Medium |
|
|
474 |
Ones and Zeroes |
|
37.1% |
Medium |
|
|
313 |
Super Ugly Number |
|
37.2% |
Medium |
|
|
24 |
Swap Nodes in Pairs |
|
37.4% |
Medium |
|
|
64 |
Minimum Path Sum |
|
37.5% |
Medium |
|
|
48 |
Rotate Image |
|
37.6% |
Medium |
|
|
533 |
Lonely Pixel II New |
|
37.6% |
Medium |
|
|
300 |
Longest Increasing Subsequence |
|
37.6% |
Medium |
|
|
102 |
Binary Tree Level Order Traversal |
|
37.8% |
Medium |
|
|
78 |
Subsets |
|
37.8% |
Medium |
|
|
240 |
Search a 2D Matrix II |
|
37.9% |
Medium |
|
|
215 |
Kth Largest Element in an Array |
|
38.1% |
Medium |
|
|
334 |
Increasing Triplet Subsequence |
|
38.2% |
Medium |
|
|
416 |
Partition Equal Subset Sum |
|
38.3% |
Medium |
|
|
77 |
Combinations |
|
38.3% |
Medium |
|
|
361 |
Bomb Enemy |
|
38.3% |
Medium |
|
|
59 |
Spiral Matrix II |
|
38.4% |
Medium |
|
|
253 |
Meeting Rooms II |
|
38.6% |
Medium |
|
|
247 |
Strobogrammatic Number II |
|
38.8% |
Medium |
|
|
380 |
Insert Delete GetRandom O(1) |
|
38.8% |
Medium |
|
|
491 |
Increasing Subsequences |
|
38.9% |
Medium |
|
|
153 |
Find Minimum in Rotated Sorted Array |
|
39.0% |
Medium |
|
|
255 |
Verify Preorder Sequence in Binary Search Tree |
|
39.3% |
Medium |
|
|
199 |
Binary Tree Right Side View |
|
39.4% |
Medium |
|
|
251 |
Flatten 2D Vector |
|
39.5% |
Medium |
|
|
390 |
Elimination Game |
|
39.6% |
Medium |
|
|
62 |
Unique Paths |
|
39.7% |
Medium |
|
|
524 |
Longest Word in Dictionary through Deleting |
|
39.8% |
Medium |
|
|
341 |
Flatten Nested List Iterator |
|
39.8% |
Medium |
|
|
173 |
Binary Search Tree Iterator |
|
39.8% |
Medium |
|
|
249 |
Group Shifted Strings |
|
39.9% |
Medium |
|
|
89 |
Gray Code |
|
39.9% |
Medium |
|
|
309 |
Best Time to Buy and Sell Stock with Cooldown |
|
40.0% |
Medium |
|
|
435 |
Non-overlapping Intervals |
|
40.1% |
Medium |
|
|
96 |
Unique Binary Search Trees |
|
40.1% |
Medium |
|
|
399 |
Evaluate Division |
|
40.1% |
Medium |
|
|
386 |
Lexicographical Numbers |
|
40.1% |
Medium |
|
|
298 |
Binary Tree Longest Consecutive Sequence |
|
40.3% |
Medium |
|
|
137 |
Single Number II |
|
40.5% |
Medium |
|
|
394 |
Decode String |
|
40.7% |
Medium |
|
|
250 |
Count Univalue Subtrees |
|
40.9% |
Medium |
|
|
424 |
Longest Repeating Character Replacement |
|
40.9% |
Medium |
|
|
259 |
3Sum Smaller |
|
41.0% |
Medium |
|
|
436 |
Find Right Interval |
|
41.2% |
Medium |
|
|
398 |
Random Pick Index |
|
41.2% |
Medium |
|
|
254 |
Factor Combinations |
|
41.3% |
Medium |
|
|
482 |
License Key Formatting |
|
41.4% |
Medium |
|
|
46 |
Permutations |
|
41.4% |
Medium |
|
|
449 |
Serialize and Deserialize BST |
|
41.5% |
Medium |
|
|
377 |
Combination Sum IV |
|
41.6% |
Medium |
|
|
490 |
The Maze |
|
41.8% |
Medium |
|
|
516 |
Longest Palindromic Subsequence |
|
41.9% |
Medium |
|
|
325 |
Maximum Size Subarray Sum Equals k |
|
41.9% |
Medium |
|
|
241 |
Different Ways to Add Parentheses |
|
42.0% |
Medium |
|
|
319 |
Bulb Switcher |
|
42.0% |
Medium |
|
|
337 |
House Robber III |
|
42.1% |
Medium |
|
|
287 |
Find the Duplicate Number |
|
42.3% |
Medium |
|
|
328 |
Odd Even Linked List |
|
42.4% |
Medium |
|
|
452 |
Minimum Number of Arrows to Burst Balloons |
|
42.5% |
Medium |
|
|
230 |
Kth Smallest Element in a BST |
|
42.6% |
Medium |
|
|
22 |
Generate Parentheses |
|
42.7% |
Medium |
|
|
318 |
Maximum Product of Word Lengths |
|
42.8% |
Medium |
|
|
216 |
Combination Sum III |
|
42.9% |
Medium |
|
|
423 |
Reconstruct Original Digits from English |
|
43.0% |
Medium |
|
|
351 |
Android Unlock Patterns |
|
43.1% |
Medium |
|
|
286 |
Walls and Gates |
|
43.1% |
Medium |
|
|
156 |
Binary Tree Upside Down |
|
43.3% |
Medium |
|
|
12 |
Integer to Roman |
|
43.4% |
Medium |
|
|
360 |
Sort Transformed Array |
|
43.4% |
Medium |
|
|
378 |
Kth Smallest Element in a Sorted Matrix |
|
43.6% |
Medium |
|
|
487 |
Max Consecutive Ones II |
|
43.6% |
Medium |
|
|
144 |
Binary Tree Preorder Traversal |
|
43.6% |
Medium |
|
|
421 |
Maximum XOR of Two Numbers in an Array |
|
44.0% |
Medium |
|
|
486 |
Predict the Winner |
|
44.0% |
Medium |
|
|
320 |
Generalized Abbreviation |
|
44.1% |
Medium |
|
|
392 |
Is Subsequence |
|
44.2% |
Medium |
|
|
494 |
Target Sum |
|
44.3% |
Medium |
|
|
94 |
Binary Tree Inorder Traversal |
|
44.6% |
Medium |
|
|
454 |
4Sum II |
|
44.9% |
Medium |
|
|
343 |
Integer Break |
|
45.2% |
Medium |
|
|
357 |
Count Numbers with Unique Digits |
|
45.4% |
Medium |
|
|
384 |
Shuffle an Array |
|
45.4% |
Medium |
|
|
348 |
Design Tic-Tac-Toe |
|
45.6% |
Medium |
|
|
481 |
Magical String |
|
45.7% |
Medium |
|
|
294 |
Flip Game II |
|
45.7% |
Medium |
|
|
477 |
Total Hamming Distance |
|
45.9% |
Medium |
|
|
445 |
Add Two Numbers II |
|
46.0% |
Medium |
|
|
503 |
Next Greater Element II |
|
46.3% |
Medium |
|
|
382 |
Linked List Random Node |
|
46.3% |
Medium |
|
|
498 |
Diagonal Traverse |
|
46.3% |
Medium |
|
|
347 |
Top K Frequent Elements |
|
46.7% |
Medium |
|
|
323 |
Number of Connected Components in an Undirected Graph |
|
47.2% |
Medium |
|
|
238 |
Product of Array Except Self |
|
47.8% |
Medium |
|
|
531 |
Lonely Pixel I New |
|
48.3% |
Medium |
|
|
281 |
Zigzag Iterator |
|
49.2% |
Medium |
|
|
245 |
Shortest Word Distance III |
|
49.6% |
Medium |
|
|
439 |
Ternary Expression Parser |
|
49.9% |
Medium |
|
|
260 |
Single Number III |
|
49.9% |
Medium |
|
|
451 |
Sort Characters By Frequency |
|
50.2% |
Medium |
|
|
311 |
Sparse Matrix Multiplication |
|
50.7% |
Medium |
|
|
364 |
Nested List Weight Sum II |
|
50.8% |
Medium |
|
|
462 |
Minimum Moves to Equal Array Elements II |
|
51.1% |
Medium |
|
|
484 |
Find Permutation |
|
51.5% |
Medium |
|
|
495 |
Teemo Attacking |
|
51.6% |
Medium |
|
|
529 |
Minesweeper |
|
51.6% |
Medium |
|
|
526 |
Beautiful Arrangement |
|
51.6% |
Medium |
|
|
508 |
Most Frequent Subtree Sum |
|
51.9% |
Medium |
|
|
442 |
Find All Duplicates in an Array |
|
52.2% |
Medium |
|
|
515 |
Find Largest Value in Each Tree Row |
|
52.8% |
Medium |
|
|
362 |
Design Hit Counter |
|
53.2% |
Medium |
|
|
369 |
Plus One Linked List |
|
53.6% |
Medium |
|
|
370 |
Range Addition |
|
54.5% |
Medium |
|
|
413 |
Arithmetic Slices |
|
54.7% |
Medium |
|
|
406 |
Queue Reconstruction by Height |
|
54.7% |
Medium |
|
|
513 |
Find Bottom Left Tree Value |
|
55.8% |
Medium |
|
|
280 |
Wiggle Sort |
|
55.8% |
Medium |
|
|
366 |
Find Leaves of Binary Tree |
|
58.0% |
Medium |
|
|
338 |
Counting Bits |
|
60.0% |
Medium |
|
|
419 |
Battleships in a Board |
|
60.5% |
Medium |
|
|
535 |
Encode and Decode TinyURL New |
|
76.6% |
Medium |