id Leetcode 1049 Rust Solutions Level
1 Two Sum Easy
2 Add Two Numbers Medium
3 Longest Substring Without Repeating Characters Medium
4 Median of Two Sorted Arrays Hard
5 Longest Palindromic Substring Medium
6 ZigZag Conversion Medium
7 Reverse Integer Easy
8 String to Integer (atoi) Medium
9 Palindrome Number Easy
10 Regular Expression Matching Hard
11 Container With Most Water Medium
12 Integer to Roman Medium
13 Roman to Integer Easy
14 Longest Common Prefix Easy
15 3Sum Medium
16 3Sum Closest Medium
17 Letter Combinations of a Phone Number Medium
18 4Sum Medium
19 Remove Nth Node From End of List Medium
20 Valid Parentheses Easy
21 Merge Two Sorted Lists Easy
22 Generate Parentheses Medium
23 Merge k Sorted Lists Hard
24 Swap Nodes in Pairs Medium
25 Reverse Nodes in k-Group Hard
26 Remove Duplicates from Sorted Array Easy
27 Remove Element Easy
28 Implement strStr() Easy
29 Divide Two Integers Medium
30 Substring with Concatenation of All Words Hard
31 Next Permutation Medium
32 Longest Valid Parentheses Hard
33 Search in Rotated Sorted Array Medium
34 Find First and Last Position of Element in Sorted Array Medium
35 Search Insert Position Easy
36 Valid Sudoku Medium
37 Sudoku Solver Hard
38 Count and Say Medium
39 Combination Sum Medium
40 Combination Sum II Medium
41 First Missing Positive 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 Group Anagrams Medium
50 Pow(x, n) Medium
51 N-Queens Hard
52 N-Queens II Hard
53 Maximum Subarray Easy
54 Spiral Matrix Medium
55 Jump Game Medium
56 Merge Intervals Medium
57 Insert Interval Medium
58 Length of Last Word Easy
59 Spiral Matrix II Medium
60 Permutation Sequence Hard
61 Rotate List Medium
62 Unique Paths Medium
63 Unique Paths II Medium
64 Minimum Path Sum Medium
65 Valid Number Hard
66 Plus One Easy
67 Add Binary Easy
68 Text Justification Hard
69 Sqrt(x) Easy
70 Climbing Stairs Easy
71 Simplify Path Medium
72 Edit Distance Hard
73 Set Matrix Zeroes Medium
74 Search a 2D Matrix Medium
75 Sort Colors Medium
76 Minimum Window Substring Hard
77 Combinations Medium
78 Subsets Medium
79 Word Search Medium
80 Remove Duplicates from Sorted Array II Medium
81 Search in Rotated Sorted Array II Medium
82 Remove Duplicates from Sorted List II Medium
83 Remove Duplicates from Sorted List Easy
84 Largest Rectangle in Histogram Hard
85 Maximal Rectangle Hard
86 Partition List Medium
87 Scramble String Hard
88 Merge Sorted Array Easy
89 Gray Code Medium
90 Subsets II Medium
91 Decode Ways Medium
92 Reverse Linked List II Medium
93 Restore IP Addresses Medium
94 Binary Tree Inorder Traversal 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 Easy
101 Symmetric Tree Easy
102 Binary Tree Level Order Traversal Medium
103 Binary Tree Zigzag Level Order Traversal Medium
104 Maximum Depth of Binary Tree 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 Easy
109 Convert Sorted List to Binary Search Tree Medium
110 Balanced Binary Tree Easy
111 Minimum Depth of Binary Tree Easy
112 Path Sum Easy
113 Path Sum II Medium
114 Flatten Binary Tree to Linked List Medium
115 Distinct Subsequences Hard
118 Pascal's Triangle Easy
120 Triangle Medium
121 Best Time to Buy and Sell Stock Easy
122 Best Time to Buy and Sell Stock II Easy
123 Best Time to Buy and Sell Stock III Hard
124 Binary Tree Maximum Path Sum Hard
125 Valid Palindrome Easy
126 Word Ladder II Hard
127 Word Ladder Hard
128 Longest Consecutive Sequence Hard
129 Sum Root to Leaf Numbers Medium
130 Surrounded Regions Medium
131 Palindrome Partitioning Medium
132 Palindrome Partitioning II Hard
134 Gas Station Medium
135 Candy Hard
136 Single Number Easy
137 Single Number II Medium
139 Word Break Medium
140 Word Break II Hard
143 Reorder List Medium
144 Binary Tree Preorder Traversal Medium
145 Binary Tree Postorder Traversal Medium
146 LRU Cache Medium
147 Insertion Sort List Medium
148 Sort List Medium
149 Max Points on a Line Hard
150 Evaluate Reverse Polish Notation Medium
151 Reverse Words in a String Medium
152 Maximum Product Subarray Medium
153 Find Minimum in Rotated Sorted Array Medium
154 Find Minimum in Rotated Sorted Array II Hard
155 Min Stack Easy
156 Binary Tree Upside Down Medium
157 Read N Characters Given Read4 Easy
159 Longest Substring with At Most Two Distinct Characters Medium
161 One Edit Distance Medium
162 Find Peak Element Medium
163 Missing Ranges Easy
164 Maximum Gap Hard
165 Compare Version Numbers Medium
166 Fraction to Recurring Decimal Medium
167 Two Sum II - Input array is sorted Easy
168 Excel Sheet Column Title Easy
169 Majority Element Easy
170 Two Sum III - Data structure design Easy
171 Excel Sheet Column Number Easy
172 Factorial Trailing Zeroes Easy
173 Binary Search Tree Iterator Medium
174 Dungeon Game Hard
179 Largest Number Medium
186 Reverse Words in a String II Medium
187 Repeated DNA Sequences Medium
188 Best Time to Buy and Sell Stock IV Hard
189 Rotate Array Medium
190 Reverse Bits Easy
191 Number of 1 Bits Easy
198 House Robber Medium
199 Binary Tree Right Side View Medium
200 Number of Islands Medium
201 Bitwise AND of Numbers Range Medium
202 Happy Number Easy
203 Remove Linked List Elements Easy
204 Count Primes Easy
205 Isomorphic Strings Easy
206 Reverse Linked List Easy
207 Course Schedule Medium
208 Implement Trie (Prefix Tree) Medium
209 Minimum Size Subarray Sum Medium
210 Course Schedule II Medium
211 Design Add and Search Words Data Structure 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 Easy
218 The Skyline Problem Hard
219 Contains Duplicate II Easy
220 Contains Duplicate III Medium
221 Maximal Square Medium
222 Count Complete Tree Nodes Medium
223 Rectangle Area Medium
224 Basic Calculator Hard
225 Implement Stack using Queues Easy
226 Invert Binary Tree Easy
227 Basic Calculator II Medium
228 Summary Ranges Easy
229 Majority Element II Medium
230 Kth Smallest Element in a BST Medium
231 Power of Two Easy
232 Implement Queue using Stacks Easy
233 Number of Digit One Hard
234 Palindrome Linked List Easy
235 Lowest Common Ancestor of a Binary Search Tree Easy
236 Lowest Common Ancestor of a Binary Tree Medium
238 Product of Array Except Self Medium
239 Sliding Window Maximum Hard
240 Search a 2D Matrix II Medium
241 Different Ways to Add Parentheses Medium
242 Valid Anagram Easy
243 Shortest Word Distance Easy
244 Shortest Word Distance II Medium
245 Shortest Word Distance III Medium
246 Strobogrammatic Number Easy
247 Strobogrammatic Number II Medium
248 Strobogrammatic Number III Hard
249 Group Shifted Strings Medium
250 Count Univalue Subtrees Medium
251 Flatten 2D Vector Medium
252 Meeting Rooms Easy
253 Meeting Rooms II Medium
254 Factor Combinations Medium
255 Verify Preorder Sequence in Binary Search Tree Medium
256 Paint House Medium
257 Binary Tree Paths Easy
258 Add Digits Easy
259 3Sum Smaller Medium
260 Single Number III Medium
261 Graph Valid Tree Medium
263 Ugly Number Easy
264 Ugly Number II Medium
265 Paint House II Hard
266 Palindrome Permutation Easy
267 Palindrome Permutation II Medium
268 Missing Number Easy
269 Alien Dictionary Hard
270 Closest Binary Search Tree Value Easy
271 Encode and Decode Strings Medium
272 Closest Binary Search Tree Value II Hard
273 Integer to English Words Hard
274 H-Index Medium
275 H-Index II Medium
276 Paint Fence Easy
277 Find the Celebrity Medium
278 First Bad Version Easy
279 Perfect Squares Medium
280 Wiggle Sort Medium
281 Zigzag Iterator Medium
282 Expression Add Operators Hard
283 Move Zeroes Easy
285 Inorder Successor in BST Medium
286 Walls and Gates Medium
287 Find the Duplicate Number Medium
288 Unique Word Abbreviation Medium
289 Game of Life Medium
290 Word Pattern Easy
291 Word Pattern II Medium
292 Nim Game Easy
293 Flip Game Easy
294 Flip Game II Medium
295 Find Median from Data Stream Hard
296 Best Meeting Point Hard
297 Serialize and Deserialize Binary Tree Hard
298 Binary Tree Longest Consecutive Sequence Medium
299 Bulls and Cows Medium
300 Longest Increasing Subsequence Medium
301 Remove Invalid Parentheses Hard
302 Smallest Rectangle Enclosing Black Pixels Hard
303 Range Sum Query - Immutable Easy
304 Range Sum Query 2D - Immutable Medium
305 Number of Islands II Hard
306 Additive Number Medium
307 Range Sum Query - Mutable Medium
309 Best Time to Buy and Sell Stock with Cooldown Medium
310 Minimum Height Trees Medium
311 Sparse Matrix Multiplication Medium
312 Burst Balloons Hard
313 Super Ugly Number Medium
314 Binary Tree Vertical Order Traversal Medium
315 Count of Smaller Numbers After Self Hard
316 Remove Duplicate Letters Medium
317 Shortest Distance from All Buildings Hard
318 Maximum Product of Word Lengths Medium
319 Bulb Switcher Medium
320 Generalized Abbreviation Medium
321 Create Maximum Number Hard
322 Coin Change Medium
323 Number of Connected Components in an Undirected Graph Medium
324 Wiggle Sort II Medium
325 Maximum Size Subarray Sum Equals k Medium
326 Power of Three Easy
328 Odd Even Linked List 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 Medium
334 Increasing Triplet Subsequence Medium
336 Palindrome Pairs Hard
337 House Robber III Medium
338 Counting Bits Medium
339 Nested List Weight Sum Medium
340 Longest Substring with At Most K Distinct Characters Medium
341 Flatten Nested List Iterator Medium
342 Power of Four Easy
343 Integer Break Medium
344 Reverse String Easy
345 Reverse Vowels of a String Easy
346 Moving Average from Data Stream Easy
347 Top K Frequent Elements Medium
348 Design Tic-Tac-Toe Medium
349 Intersection of Two Arrays Easy
350 Intersection of Two Arrays II Easy
351 Android Unlock Patterns Medium
352 Data Stream as Disjoint Intervals Hard
353 Design Snake Game Medium
354 Russian Doll Envelopes Hard
355 Design Twitter Medium
356 Line Reflection Medium
357 Count Numbers with Unique Digits Medium
358 Rearrange String k Distance Apart Hard
359 Logger Rate Limiter Easy
360 Sort Transformed Array Medium
361 Bomb Enemy Medium
362 Design Hit Counter Medium
363 Max Sum of Rectangle No Larger Than K Hard
364 Nested List Weight Sum II Medium
365 Water and Jug Problem Medium
366 Find Leaves of Binary Tree Medium
367 Valid Perfect Square Easy
368 Largest Divisible Subset Medium
369 Plus One Linked List Medium
370 Range Addition Medium
371 Sum of Two Integers Medium
372 Super Pow Medium
373 Find K Pairs with Smallest Sums Medium
374 Guess Number Higher or Lower Easy
375 Guess Number Higher or Lower II Medium
376 Wiggle Subsequence Medium
377 Combination Sum IV Medium
378 Kth Smallest Element in a Sorted Matrix Medium
379 Design Phone Directory Medium
380 Insert Delete GetRandom O(1) Medium
381 Insert Delete GetRandom O(1) - Duplicates allowed Hard
382 Linked List Random Node Medium
383 Ransom Note Easy
384 Shuffle an Array Medium
385 Mini Parser Medium
386 Lexicographical Numbers Medium
387 First Unique Character in a String Easy
388 Longest Absolute File Path Medium
389 Find the Difference Easy
390 Elimination Game Medium
391 Perfect Rectangle Hard
392 Is Subsequence Easy
393 UTF-8 Validation Medium
394 Decode String Medium
395 Longest Substring with At Least K Repeating Characters Medium
396 Rotate Function Medium
397 Integer Replacement Medium
398 Random Pick Index Medium
399 Evaluate Division Medium
400 Nth Digit Medium
401 Binary Watch Easy
402 Remove K Digits Medium
403 Frog Jump Hard
404 Sum of Left Leaves Easy
405 Convert a Number to Hexadecimal Easy
406 Queue Reconstruction by Height Medium
407 Trapping Rain Water II Hard
408 Valid Word Abbreviation Easy
409 Longest Palindrome Easy
410 Split Array Largest Sum Hard
411 Minimum Unique Word Abbreviation Hard
412 Fizz Buzz Easy
413 Arithmetic Slices Medium
414 Third Maximum Number Easy
415 Add Strings Easy
416 Partition Equal Subset Sum Medium
417 Pacific Atlantic Water Flow Medium
418 Sentence Screen Fitting 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 Easy
423 Reconstruct Original Digits from English Medium
424 Longest Repeating Character Replacement Medium
425 Word Squares Hard
432 All O`one Data Structure Hard
433 Minimum Genetic Mutation Medium
434 Number of Segments in a String Easy
435 Non-overlapping Intervals Medium
436 Find Right Interval Medium
437 Path Sum III Medium
438 Find All Anagrams in a String Medium
439 Ternary Expression Parser Medium
440 K-th Smallest in Lexicographical Order Hard
441 Arranging Coins Easy
442 Find All Duplicates in an Array Medium
443 String Compression Medium
444 Sequence Reconstruction Medium
445 Add Two Numbers II Medium
446 Arithmetic Slices II - Subsequence Hard
447 Number of Boomerangs Medium
448 Find All Numbers Disappeared in an Array Easy
449 Serialize and Deserialize BST Medium
450 Delete Node in a BST Medium
451 Sort Characters By Frequency Medium
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
457 Circular Array Loop Medium
458 Poor Pigs Hard
459 Repeated Substring Pattern Easy
460 LFU Cache Hard
461 Hamming Distance Easy
462 Minimum Moves to Equal Array Elements II Medium
463 Island Perimeter Easy
464 Can I Win Medium
465 Optimal Account Balancing Hard
467 Unique Substrings in Wraparound String Medium
468 Validate IP Address Medium
469 Convex Polygon Medium
470 Implement Rand10() Using Rand7() Medium
471 Encode String with Shortest Length Hard
472 Concatenated Words Hard
473 Matchsticks to Square Medium
474 Ones and Zeroes Medium
475 Heaters Medium
476 Number Complement Easy
477 Total Hamming Distance Medium
478 Generate Random Point in a Circle Medium
479 Largest Palindrome Product Hard
480 Sliding Window Median Hard
481 Magical String Medium
482 License Key Formatting Easy
484 Find Permutation Medium
485 Max Consecutive Ones Easy
486 Predict the Winner Medium
487 Max Consecutive Ones II Medium
488 Zuma Game Hard
490 The Maze Medium
491 Increasing Subsequences Medium
492 Construct the Rectangle Easy
493 Reverse Pairs Hard
494 Target Sum Medium
495 Teemo Attacking Medium
496 Next Greater Element I Easy
497 Random Point in Non-overlapping Rectangles Medium
498 Diagonal Traverse Medium
499 The Maze III Hard
500 Keyboard Row Easy
501 Find Mode in Binary Search Tree Easy
502 IPO Hard
503 Next Greater Element II Medium
504 Base 7 Easy
505 The Maze II Medium
506 Relative Ranks Easy
507 Perfect Number Easy
508 Most Frequent Subtree Sum Medium
509 Fibonacci Number Easy
513 Find Bottom Left Tree Value Medium
514 Freedom Trail Hard
515 Find Largest Value in Each Tree Row Medium
516 Longest Palindromic Subsequence Medium
517 Super Washing Machines Hard
518 Coin Change 2 Medium
519 Random Flip Matrix Medium
520 Detect Capital Easy
521 Longest Uncommon Subsequence I Easy
522 Longest Uncommon Subsequence II Medium
523 Continuous Subarray Sum Medium
524 Longest Word in Dictionary through Deleting Medium
525 Contiguous Array Medium
526 Beautiful Arrangement Medium
527 Word Abbreviation Hard
528 Random Pick with Weight Medium
529 Minesweeper Medium
530 Minimum Absolute Difference in BST Easy
531 Lonely Pixel I Medium
532 K-diff Pairs in an Array Medium
533 Lonely Pixel II Medium
535 Encode and Decode TinyURL Medium
536 Construct Binary Tree from String Medium
537 Complex Number Multiplication Medium
538 Convert BST to Greater Tree Medium
539 Minimum Time Difference Medium
540 Single Element in a Sorted Array Medium
541 Reverse String II Easy
542 01 Matrix Medium
543 Diameter of Binary Tree Easy
544 Output Contest Matches Medium
545 Boundary of Binary Tree Medium
546 Remove Boxes Hard
547 Number of Provinces Medium
548 Split Array with Equal Sum Medium
549 Binary Tree Longest Consecutive Sequence II Medium
551 Student Attendance Record I Easy
552 Student Attendance Record II Hard
553 Optimal Division Medium
554 Brick Wall Medium
555 Split Concatenated Strings Medium
556 Next Greater Element III Medium
557 Reverse Words in a String III Easy
560 Subarray Sum Equals K Medium
561 Array Partition I Easy
562 Longest Line of Consecutive One in Matrix Medium
563 Binary Tree Tilt Easy
564 Find the Closest Palindrome Hard
565 Array Nesting Medium
566 Reshape the Matrix Easy
567 Permutation in String Medium
568 Maximum Vacation Days Hard
572 Subtree of Another Tree Easy
573 Squirrel Simulation Medium
575 Distribute Candies Easy
576 Out of Boundary Paths Medium
581 Shortest Unsorted Continuous Subarray Medium
582 Kill Process Medium
583 Delete Operation for Two Strings Medium
588 Design In-Memory File System Hard
591 Tag Validator Hard
592 Fraction Addition and Subtraction Medium
593 Valid Square Medium
594 Longest Harmonious Subsequence Easy
598 Range Addition II Easy
599 Minimum Index Sum of Two Lists Easy
604 Design Compressed String Iterator Easy
605 Can Place Flowers Easy
606 Construct String from Binary Tree Easy
609 Find Duplicate File in System Medium
611 Valid Triangle Number Medium
616 Add Bold Tag in String Medium
617 Merge Two Binary Trees Easy
621 Task Scheduler Medium
622 Design Circular Queue Medium
623 Add One Row to Tree Medium
624 Maximum Distance in Arrays Medium
625 Minimum Factorization Medium
628 Maximum Product of Three Numbers Easy
630 Course Schedule III Hard
631 Design Excel Sum Formula Hard
632 Smallest Range Covering Elements from K Lists Hard
633 Sum of Square Numbers Medium
634 Find the Derangement of An Array Medium
635 Design Log Storage System Medium
636 Exclusive Time of Functions Medium
637 Average of Levels in Binary Tree Easy
638 Shopping Offers Medium
640 Solve the Equation Medium
641 Design Circular Deque Medium
642 Design Search Autocomplete System Hard
643 Maximum Average Subarray I Easy
645 Set Mismatch Easy
646 Maximum Length of Pair Chain Medium
647 Palindromic Substrings Medium
648 Replace Words Medium
649 Dota2 Senate Medium
650 2 Keys Keyboard Medium
651 4 Keys Keyboard Medium
652 Find Duplicate Subtrees Medium
653 Two Sum IV - Input is a BST Easy
654 Maximum Binary Tree Medium
655 Print Binary Tree Medium
657 Robot Return to Origin Easy
658 Find K Closest Elements Medium
659 Split Array into Consecutive Subsequences Medium
660 Remove 9 Hard
661 Image Smoother Easy
662 Maximum Width of Binary Tree Medium
663 Equal Tree Partition Medium
665 Non-decreasing Array Medium
666 Path Sum IV Medium
667 Beautiful Arrangement II Medium
668 Kth Smallest Number in Multiplication Table Hard
669 Trim a Binary Search Tree Medium
670 Maximum Swap Medium
671 Second Minimum Node In a Binary Tree Easy
672 Bulb Switcher II Medium
673 Number of Longest Increasing Subsequence Medium
674 Longest Continuous Increasing Subsequence Easy
675 Cut Off Trees for Golf Event Hard
676 Implement Magic Dictionary Medium
677 Map Sum Pairs Medium
678 Valid Parenthesis String Medium
679 24 Game Hard
680 Valid Palindrome II Easy
681 Next Closest Time Medium
682 Baseball Game Easy
683 K Empty Slots Hard
684 Redundant Connection Medium
686 Repeated String Match Medium
687 Longest Univalue Path Medium
688 Knight Probability in Chessboard Medium
689 Maximum Sum of 3 Non-Overlapping Subarrays Hard
692 Top K Frequent Words Medium
693 Binary Number with Alternating Bits Easy
694 Number of Distinct Islands Medium
695 Max Area of Island Medium
696 Count Binary Substrings Easy
697 Degree of an Array Easy
698 Partition to K Equal Sum Subsets Medium
700 Search in a Binary Search Tree Easy
701 Insert into a Binary Search Tree Medium
703 Kth Largest Element in a Stream Easy
704 Binary Search Easy
705 Design HashSet Easy
706 Design HashMap Easy
707 Design Linked List Medium
709 To Lower Case Easy
710 Random Pick with Blacklist Hard
712 Minimum ASCII Delete Sum for Two Strings Medium
713 Subarray Product Less Than K Medium
714 Best Time to Buy and Sell Stock with Transaction Fee Medium
716 Max Stack Easy
717 1-bit and 2-bit Characters Easy
718 Maximum Length of Repeated Subarray Medium
719 Find K-th Smallest Pair Distance Hard
720 Longest Word in Dictionary Easy
721 Accounts Merge Medium
722 Remove Comments Medium
723 Candy Crush Medium
724 Find Pivot Index Easy
725 Split Linked List in Parts Medium
726 Number of Atoms Hard
727 Minimum Window Subsequence Hard
728 Self Dividing Numbers Easy
729 My Calendar I Medium
731 My Calendar II Medium
732 My Calendar III Hard
733 Flood Fill Easy
734 Sentence Similarity Easy
735 Asteroid Collision Medium
736 Parse Lisp Expression Hard
737 Sentence Similarity II Medium
738 Monotone Increasing Digits Medium
739 Daily Temperatures Medium
740 Delete and Earn Medium
742 Closest Leaf in a Binary Tree Medium
743 Network Delay Time Medium
744 Find Smallest Letter Greater Than Target Easy
746 Min Cost Climbing Stairs Easy
747 Largest Number At Least Twice of Others Easy
748 Shortest Completing Word Easy
750 Number Of Corner Rectangles Medium
751 IP to CIDR Medium
752 Open the Lock Medium
753 Cracking the Safe Hard
754 Reach a Number Medium
755 Pour Water Medium
756 Pyramid Transition Matrix Medium
758 Bold Words in String Easy
759 Employee Free Time Hard
760 Find Anagram Mappings Easy
761 Special Binary String Hard
762 Prime Number of Set Bits in Binary Representation Easy
763 Partition Labels Medium
764 Largest Plus Sign Medium
765 Couples Holding Hands Hard
766 Toeplitz Matrix Easy
767 Reorganize String Medium
768 Max Chunks To Make Sorted II Hard
769 Max Chunks To Make Sorted Medium
770 Basic Calculator IV Hard
771 Jewels and Stones Easy
772 Basic Calculator III Hard
773 Sliding Puzzle Hard
774 Minimize Max Distance to Gas Station Hard
775 Global and Local Inversions Medium
776 Split BST Medium
777 Swap Adjacent in LR String Medium
778 Swim in Rising Water Hard
779 K-th Symbol in Grammar Medium
780 Reaching Points Hard
781 Rabbits in Forest Medium
783 Minimum Distance Between BST Nodes Easy
784 Letter Case Permutation Medium
785 Is Graph Bipartite? Medium
786 K-th Smallest Prime Fraction Hard
787 Cheapest Flights Within K Stops Medium
788 Rotated Digits Easy
789 Escape The Ghosts Medium
790 Domino and Tromino Tiling Medium
791 Custom Sort String Medium
792 Number of Matching Subsequences Medium
794 Valid Tic-Tac-Toe State Medium
795 Number of Subarrays with Bounded Maximum Medium
796 Rotate String Easy
797 All Paths From Source to Target Medium
799 Champagne Tower Medium
800 Similar RGB Color Easy
801 Minimum Swaps To Make Sequences Increasing Medium
802 Find Eventual Safe States Medium
804 Unique Morse Code Words Easy
805 Split Array With Same Average Hard
806 Number of Lines To Write String Easy
807 Max Increase to Keep City Skyline Medium
808 Soup Servings Medium
809 Expressive Words Medium
810 Chalkboard XOR Game Hard
811 Subdomain Visit Count Easy
812 Largest Triangle Area Easy
813 Largest Sum of Averages Medium
814 Binary Tree Pruning Medium
815 Bus Routes Hard
816 Ambiguous Coordinates Medium
817 Linked List Components Medium
818 Race Car Hard
819 Most Common Word Easy
820 Short Encoding of Words Medium
821 Shortest Distance to a Character Easy
822 Card Flipping Game Medium
823 Binary Trees With Factors Medium
824 Goat Latin Easy
825 Friends Of Appropriate Ages Medium
826 Most Profit Assigning Work Medium
827 Making A Large Island Hard
828 Count Unique Characters of All Substrings of a Given String Hard
829 Consecutive Numbers Sum Hard
830 Positions of Large Groups Easy
831 Masking Personal Information Medium
832 Flipping an Image Easy
833 Find And Replace in String Medium
835 Image Overlap Medium
836 Rectangle Overlap Easy
837 New 21 Game Medium
838 Push Dominoes Medium
840 Magic Squares In Grid Medium
841 Keys and Rooms Medium
842 Split Array into Fibonacci Sequence Medium
843 Guess the Word Hard
844 Backspace String Compare Easy
845 Longest Mountain in Array Medium
846 Hand of Straights Medium
847 Shortest Path Visiting All Nodes Hard
848 Shifting Letters Medium
849 Maximize Distance to Closest Person Medium
851 Loud and Rich Medium
852 Peak Index in a Mountain Array Easy
853 Car Fleet Medium
854 K-Similar Strings Hard
855 Exam Room Medium
856 Score of Parentheses Medium
857 Minimum Cost to Hire K Workers Hard
858 Mirror Reflection Medium
859 Buddy Strings Easy
860 Lemonade Change Easy
861 Score After Flipping Matrix Medium
862 Shortest Subarray with Sum at Least K Hard
863 All Nodes Distance K in Binary Tree Medium
865 Smallest Subtree with all the Deepest Nodes Medium
866 Prime Palindrome Medium
867 Transpose Matrix Easy
868 Binary Gap Easy
869 Reordered Power of 2 Medium
870 Advantage Shuffle Medium
871 Minimum Number of Refueling Stops Hard
872 Leaf-Similar Trees Easy
873 Length of Longest Fibonacci Subsequence Medium
874 Walking Robot Simulation Easy
875 Koko Eating Bananas Medium
876 Middle of the Linked List Easy
877 Stone Game Medium
880 Decoded String at Index Medium
881 Boats to Save People Medium
883 Projection Area of 3D Shapes Easy
884 Uncommon Words from Two Sentences Easy
885 Spiral Matrix III Medium
886 Possible Bipartition Medium
888 Fair Candy Swap Easy
889 Construct Binary Tree from Preorder and Postorder Traversal Medium
890 Find and Replace Pattern Medium
891 Sum of Subsequence Widths Hard
892 Surface Area of 3D Shapes Easy
893 Groups of Special-Equivalent Strings Easy
894 All Possible Full Binary Trees Medium
895 Maximum Frequency Stack Hard
896 Monotonic Array Easy
897 Increasing Order Search Tree Easy
898 Bitwise ORs of Subarrays Medium
899 Orderly Queue Hard
900 RLE Iterator Medium
901 Online Stock Span Medium
903 Valid Permutations for DI Sequence Hard
904 Fruit Into Baskets Medium
905 Sort Array By Parity Easy
907 Sum of Subarray Minimums Medium
908 Smallest Range I Easy
909 Snakes and Ladders Medium
910 Smallest Range II Medium
911 Online Election Medium
912 Sort an Array Medium
914 X of a Kind in a Deck of Cards Easy
915 Partition Array into Disjoint Intervals Medium
916 Word Subsets Medium
917 Reverse Only Letters Easy
918 Maximum Sum Circular Subarray Medium
919 Complete Binary Tree Inserter Medium
921 Minimum Add to Make Parentheses Valid Medium
922 Sort Array By Parity II Easy
923 3Sum With Multiplicity Medium
924 Minimize Malware Spread Hard
925 Long Pressed Name Easy
926 Flip String to Monotone Increasing Medium
929 Unique Email Addresses Easy
930 Binary Subarrays With Sum Medium
931 Minimum Falling Path Sum Medium
932 Beautiful Array Medium
933 Number of Recent Calls Easy
934 Shortest Bridge Medium
935 Knight Dialer Medium
937 Reorder Data in Log Files Easy
938 Range Sum of BST Easy
939 Minimum Area Rectangle Medium
941 Valid Mountain Array Easy
942 DI String Match Easy
944 Delete Columns to Make Sorted Easy
945 Minimum Increment to Make Array Unique Medium
946 Validate Stack Sequences Medium
947 Most Stones Removed with Same Row or Column Medium
948 Bag of Tokens Medium
949 Largest Time for Given Digits Medium
950 Reveal Cards In Increasing Order Medium
951 Flip Equivalent Binary Trees Medium
953 Verifying an Alien Dictionary Easy
954 Array of Doubled Pairs Medium
955 Delete Columns to Make Sorted II Medium
957 Prison Cells After N Days Medium
958 Check Completeness of a Binary Tree Medium
959 Regions Cut By Slashes Medium
960 Delete Columns to Make Sorted III Hard
961 N-Repeated Element in Size 2N Array Easy
962 Maximum Width Ramp Medium
963 Minimum Area Rectangle II Medium
965 Univalued Binary Tree Easy
966 Vowel Spellchecker Medium
967 Numbers With Same Consecutive Differences Medium
969 Pancake Sorting Medium
970 Powerful Integers Medium
971 Flip Binary Tree To Match Preorder Traversal Medium
972 Equal Rational Numbers Hard
973 K Closest Points to Origin Medium
974 Subarray Sums Divisible by K Medium
976 Largest Perimeter Triangle Easy
977 Squares of a Sorted Array Easy
978 Longest Turbulent Subarray Medium
979 Distribute Coins in Binary Tree Medium
980 Unique Paths III Hard
981 Time Based Key-Value Store Medium
982 Triples with Bitwise AND Equal To Zero Hard
983 Minimum Cost For Tickets Medium
984 String Without AAA or BBB Medium
985 Sum of Even Numbers After Queries Easy
986 Interval List Intersections Medium
987 Vertical Order Traversal of a Binary Tree Hard
988 Smallest String Starting From Leaf Medium
989 Add to Array-Form of Integer Easy
990 Satisfiability of Equality Equations Medium
991 Broken Calculator Medium
992 Subarrays with K Different Integers Hard
993 Cousins in Binary Tree Easy
994 Rotting Oranges Medium
995 Minimum Number of K Consecutive Bit Flips Hard
997 Find the Town Judge Easy
998 Maximum Binary Tree II Medium
999 Available Captures for Rook Easy
1002 Find Common Characters Easy
1003 Check If Word Is Valid After Substitutions Medium
1004 Max Consecutive Ones III Medium
1005 Maximize Sum Of Array After K Negations Easy
1006 Clumsy Factorial Medium
1007 Minimum Domino Rotations For Equal Row Medium
1008 Construct Binary Search Tree from Preorder Traversal Medium
1009 Complement of Base 10 Integer Easy
1010 Pairs of Songs With Total Durations Divisible by 60 Medium
1011 Capacity To Ship Packages Within D Days Medium
1013 Partition Array Into Three Parts With Equal Sum Easy
1014 Best Sightseeing Pair Medium
1015 Smallest Integer Divisible by K Medium
1016 Binary String With Substrings Representing 1 To N Medium
1017 Convert to Base -2 Medium
1018 Binary Prefix Divisible By 5 Easy
1019 Next Greater Node In Linked List Medium
1020 Number of Enclaves Medium
1021 Remove Outermost Parentheses Easy
1022 Sum of Root To Leaf Binary Numbers Easy
1023 Camelcase Matching Medium
1024 Video Stitching Medium
1025 Divisor Game Easy
1026 Maximum Difference Between Node and Ancestor Medium
1027 Longest Arithmetic Subsequence Medium
1028 Recover a Tree From Preorder Traversal Hard
1029 Two City Scheduling Medium
1030 Matrix Cells in Distance Order Easy
1031 Maximum Sum of Two Non-Overlapping Subarrays Medium
1032 Stream of Characters Hard
1033 Moving Stones Until Consecutive Easy
1034 Coloring A Border Medium
1035 Uncrossed Lines Medium
1036 Escape a Large Maze Hard
1037 Valid Boomerang Easy
1038 Binary Search Tree to Greater Sum Tree Medium
1039 Minimum Score Triangulation of Polygon Medium
1040 Moving Stones Until Consecutive II Medium
1041 Robot Bounded In Circle Medium
1042 Flower Planting With No Adjacent Medium
1043 Partition Array for Maximum Sum Medium
1044 Longest Duplicate Substring Hard
1046 Last Stone Weight Easy
1047 Remove All Adjacent Duplicates In String Easy
1048 Longest String Chain Medium
1049 Last Stone Weight II Medium
1051 Height Checker Easy
1052 Grumpy Bookstore Owner Medium
1053 Previous Permutation With One Swap Medium
1054 Distant Barcodes Medium
1055 Shortest Way to Form String Medium
1056 Confusing Number Easy
1057 Campus Bikes Medium
1058 Minimize Rounding Error to Meet Target Medium
1059 All Paths from Source Lead to Destination Medium
1060 Missing Element in Sorted Array Medium
1061 Lexicographically Smallest Equivalent String Medium
1062 Longest Repeating Substring Medium
1063 Number of Valid Subarrays Hard
1064 Fixed Point Easy
1065 Index Pairs of a String Easy
1066 Campus Bikes II Medium
1071 Greatest Common Divisor of Strings Easy
1072 Flip Columns For Maximum Number of Equal Rows Medium
1073 Adding Two Negabinary Numbers Medium
1074 Number of Submatrices That Sum to Target Hard
1078 Occurrences After Bigram Easy
1079 Letter Tile Possibilities Medium
1080 Insufficient Nodes in Root to Leaf Paths Medium
1081 Smallest Subsequence of Distinct Characters Medium
1085 Sum of Digits in the Minimum Number Easy
1086 High Five Easy
1087 Brace Expansion Medium
1089 Duplicate Zeros Easy
1090 Largest Values From Labels Medium
1091 Shortest Path in Binary Matrix Medium
1092 Shortest Common Supersequence Hard
1093 Statistics from a Large Sample Medium
1094 Car Pooling Medium
1096 Brace Expansion II Hard
1099 Two Sum Less Than K Easy
1163 Last Substring in Lexicographical Order Hard
1172 Dinner Plate Stacks Hard
1206 Design Skiplist Hard
1210 Minimum Moves to Reach Target with Rotations Hard
1224 Maximum Equal Frequency Hard
1237 Find Positive Integer Solution for a Given Equation Medium
1245 Tree Diameter Medium
1246 Palindrome Removal Hard
1263 Minimum Moves to Move a Box to Their Target Location Hard
1274 Number of Ships in a Rectangle Hard
1293 Shortest Path in a Grid with Obstacles Elimination Hard
1316 Distinct Echo Substrings Hard
1330 Reverse Subarray To Maximize Array Value Hard
1377 Frog Position After T Seconds Hard
1428 Leftmost Column with at Least a One Medium
1458 Max Dot Product of Two Subsequences Hard
1494 Parallel Courses II Hard
1499 Max Value of Equation Hard
1531 String Compression II Hard
1533 Find the Index of the Large Integer Medium
1538 Guess the Majority in a Hidden Array Medium
1591 Strange Printer II Hard
1611 Minimum One Bit Operations to Make Integers Zero Hard
1617 Count Subtrees With Max Distance Between Cities Hard
1631 Path With Minimum Effort Medium
1636 Sort Array by Increasing Frequency Easy
1637 Widest Vertical Area Between Two Points Containing No Points Medium
1638 Count Substrings That Differ by One Character Medium
1640 Check Array Formation Through Concatenation Easy
1641 Count Sorted Vowel Strings Medium
1642 Furthest Building You Can Reach Medium
1643 Kth Smallest Instructions Hard
1646 Get Maximum in Generated Array Easy
1647 Minimum Deletions to Make Character Frequencies Unique Medium
1648 Sell Diminishing-Valued Colored Balls Medium
1652 Defuse the Bomb Easy
1653 Minimum Deletions to Make String Balanced Medium
1654 Minimum Jumps to Reach Home Medium
1656 Design an Ordered Stream Easy
1657 Determine if Two Strings Are Close Medium
1658 Minimum Operations to Reduce X to Zero Medium
1659 Maximize Grid Happiness Hard
1668 Maximum Repeating Substring Easy
1669 Merge In Between Linked Lists Medium
1670 Design Front Middle Back Queue Medium
1671 Minimum Number of Removals to Make Mountain Array Hard
1673 Find the Most Competitive Subsequence Medium
1674 Minimum Moves to Make Array Complementary Medium
1678 Goal Parser Interpretation Easy
1679 Max Number of K-Sum Pairs Medium
1680 Concatenation of Consecutive Binary Numbers Medium
1681 Minimum Incompatibility Hard
1682 Longest Palindromic Subsequence II Medium
1684 Count the Number of Consistent Strings Easy
1685 Sum of Absolute Differences in a Sorted Array Medium
1686 Stone Game VI Medium
1688 Count of Matches in Tournament Easy
1689 Partitioning Into Minimum Number Of Deci-Binary Numbers Medium
1690 Stone Game VII Medium
1691 Maximum Height by Stacking Cuboids Hard
1692 Count Ways to Distribute Candies Hard
1694 Reformat Phone Number Easy
1695 Maximum Erasure Value Medium
1696 Jump Game VI Medium
1697 Checking Existence of Edge Length Limited Paths Hard
1698 Number of Distinct Substrings in a String Medium
1700 Number of Students Unable to Eat Lunch Easy
1701 Average Waiting Time Medium
1702 Maximum Binary String After Change Medium
1704 Determine if String Halves Are Alike Easy
1705 Maximum Number of Eaten Apples Medium
1706 Where Will the Ball Fall Medium
1708 Largest Subarray Length K Easy
1710 Maximum Units on a Truck Easy
1711 Count Good Meals Medium
1712 Ways to Split Array Into Three Subarrays Medium
1713 Minimum Operations to Make a Subsequence Hard
1716 Calculate Money in Leetcode Bank Easy
1717 Maximum Score From Removing Substrings Medium
1718 Construct the Lexicographically Largest Valid Sequence Medium
1720 Decode XORed Array Easy
1721 Swapping Nodes in a Linked List Medium
1722 Minimize Hamming Distance After Swap Operations Medium
1725 Number Of Rectangles That Can Form The Largest Square Easy
1726 Tuple with Same Product Medium
1730 Shortest Path to Get Food Medium
1732 Find the Highest Altitude Easy
1733 Minimum Number of People to Teach Medium
1734 Decode XORed Permutation Medium
1736 Latest Time by Replacing Hidden Digits Easy
1737 Change Minimum Characters to Satisfy One of Three Conditions Medium
1738 Find Kth Largest XOR Coordinate Value Medium
1740 Find Distance in a Binary Tree Medium
1746 Maximum Subarray Sum After One Operation Medium