LeetCode

The repository contains the best versions of my solutions to LeetCode problems

Author

• Kyrylo-Ktl on LeetCode

Complexity chart

Number of operations for complexity

$f(n)$	$n = 10$	$n = 10^{2}$	$n = 10^{3}$	$n = 10^{4}$	$n = 10^{5}$	$n = 10^{6}$
$1$	$1$	$1$	$1$	$1$	$1$	$1$
$\log n$	$\approx 3.32$	$\approx 6.64$	$\approx 9.97$	$\approx 1.33 * 10$	$\approx 1.66 * 10$	$\approx 1.99 * 10$
$n$	$10$	$10^{2}$	$10^{3}$	$10^{4}$	$10^{5}$	$10^{6}$
$n * \log n$	$\approx 3.32 * 10$	$\approx 6.64 * 10^{2}$	$\approx 9.97 * 10^{3}$	$\approx 1.33 * 10^{5}$	$\approx 1.66 * 10^{6}$	$\approx 1.99 * 10^{7}$
$n^{2}$	$10^{2}$	$10^{4}$	$10^{6}$	$10^{8}$	$10^{10}$	$10^{12}$
$2^{n}$	$\approx 10^{3}$	$\approx 10^{30}$	$\approx 10^{301}$	$\approx 10^{3010}$	$\approx 10^{30102}$	$\approx 10^{301030}$
$n!$	$\approx 10^{7}$	$\approx 10^{156}$	$\approx 10^{2568}$	$\approx 10^{35660}$	$\approx 10^{456574}$	$\approx 10^{5565709}$

Complexity notations

Notation	Name	Sign	Meaning
$o$	Little O	$<$	Less than
$O$	Big O	$\leq$	Less than or equal to
$\Theta$	Theta	$=$	Equal to
$\Omega$	Big Omega	$\geq$	Greater than or equal to
$\omega$	Little Omega	$>$	Greater than

Solutions

№	Title	Solutions	Time	Memory	Notes	Beats Time	Beats Memory
1	Two Sum	Python, Java	$O(n)$	$O(n)$	-	99.78%	88.62%
2	Add Two Numbers	Python, Java	$O(n+m)$	$O(1)$	-	99.36%	95.33%
3	Longest Substring Without Repeating Characters	Python, Java	$O(n)$	$O(1)$	-	100.00%	91.50%
6	Zigzag Conversion	Python	$O(n)$	$O(n)$	-	-	-
8	String to Integer (atoi)	Python	$O(n)$	$O(n)$	RegEx	94.55%	100.00%
9	Palindrome Number	Python, Java	$O(\log_{10} n)$	$O(1)$	-	95.52%	100.00%
10	Regular Expression Matching	Python	$O(n*m)$	$O(n*m)$	DP	-	-
11	Container With Most Water	Python, Java	$O(n)$	$O(1)$	Two Pointers	98.13%	91.81%
12	Integer to Roman	Python	$O(1)$	$O(1)$	-	-	-
13	Roman to Integer	Python	$O(1)$	$O(1)$	-	-	-
14	Longest Common Prefix	Python	$O(n)$	$O(1)$	-	-	-
15	3Sum	Python	$O(n^{2})$	$O(1)$	Two Pointers	-	-
19	Remove Nth Node From End of List	Python, Java	$O(n)$	$O(1)$	-	-	-
20	Valid Parentheses	Python, Java	$O(n)$	$O(n)$	Stack	99.78%	94.20%
22	Generate Parentheses	Python, Java	$O(2^{n})$	$O(n)$	Backtracking	-	-
26	Remove Duplicates from Sorted Array	Python, Java	$O(n)$	$O(1)$	-	100.00%	85.81%
27	Remove Element	Python, Java	$O(n)$	$O(1)$	-	100.00%	85.12%
30	Substring with Concatenation of All Words	Python	$O(n*k)$	$O(m*k)$	-	-	-
36	Valid Sudoku	Python, Java	$O(n^{2})$	$O(n^{2})$	-	100.00%	97.10%
38	Count and Say	Python	$O(2^{n})$	$O(2^{n})$	-	-	-
42	Trapping Rain Water	Python	$O(n)$	$O(n)$	-	-	-
48	Rotate Image	Python	$O(n^{2})$	$O(1)$	-	99.29%	98.14%
49	Group Anagrams	Python	$O(n * m * \log_{2} m)$	$O(n * m)$	-	-	-
50	Pow(x, n)	Python	$O(\log_{2} n)$	$O(\log_{2} n)$	BinPow	-	-
53	Maximum Subarray	Python, Java	$O(n)$	$O(1)$	Kadane's	100.00%	93.17%
54	Spiral Matrix	Python	?	?	-	-	-
55	Jump Game	Python	$O(n)$	$O(1)$	-	-	-
61	Rotate List	Python	$O(n)$	$O(1)$	-	-	-
62	Unique Paths	Python, Java	$O(min(n,m))$	$O(1)$	DP / Math	-	-
68	Text Justification	Python	$O(n)$	$O(n)$	-	-	-
70	Climbing Stairs	Python	$O(n)$	$O(n)$	DP	-	-
71	Simplify Path	Python	$O(n)$	$O(n)$	-	-	-
72	Edit Distance	Python, Java	$O(n*m)$	$O(n*m)$	DP	92.85%	91.32%
73	Set Matrix Zeroes	Python	$O(n * m)$	$O(n + m)$	-	97.19%	53.65%
74	Search a 2D Matrix	Python, Java	$O(\log_{2} (n*m))$	$O(1)$	Binary Search	-	-
78	Subsets	Python	$O(2^{n})$	$O(n)$	-	-	-
79	Word Search	Python	$O(n * m * k)$	$O(k)$	DFS	99.72%	93.26%
80	Remove Duplicates from Sorted Array II	Python	$O(n)$	$O(1)$	-	-	-
82	Remove Duplicates from Sorted List II	Python	$O(n)$	$O(1)$	-	-	-
86	Partition List	Python	$O(n)$	$O(1)$	-	-	-
88	Merge Sorted Array	Python, Java	$O(n + m)$	$O(1)$	-	100.00%	83.33%
89	Gray Code	Python, Java	$O(2^{n})$	$O(1)$	Math	96.07%	97.95%
91	Decode Ways	Python	$O(n)$	$O(n)$	DP	-	-
94	Binary Tree Inorder Traversal	Python	$O(n)$	$O(n)$	-	-	-
95	Unique Binary Search Trees II	Python	$O(n^{2})$	$O(\log_{2} n)$	DP	-	-
96	Unique Binary Search Trees	Python	$O(n)$	$O(1)$	DP, Math	-	-
98	Validate Binary Search Tree	Python	$O(n)$	$O(n)$	DFS	-	-
100	Same Tree	Python	$O(n)$	$O(H)$	-	-	-
101	Symmetric Tree	Python	$O(n)$	$O(n)$	DFS, BFS	-	-
104	Maximum Depth of Binary Tree	Python	$O(n)$	$O(n)$	DFS	-	-
108	Convert Sorted Array to Binary Search Tree	Python	$O(n)$	$O(\log_{2} n)$	-	-	-
109	Convert Sorted List to Binary Search Tree	Python	$O(n*\log_{2} n)$	$O(\log_{2} n)$	DFS	-	-
111	Minimum Depth of Binary Tree	Python, Java	$O(n)$	$O(n)$	-	99.77%	94.85%
112	Path Sum	Python	$O(n)$	$O(n)$	DFS	-	-
113	Path Sum II	Python	-	-	-	-	-
114	Flatten Binary Tree to Linked List	Python	$O(n)$	$O(1)$	-	-	-
124	Binary Tree Maximum Path Sum	Python	$O(n)$	$O(n)$	-	-	-
125	Valid Palindrome	Python, Java	$O(n)$	$O(1)$	-	99.31%	92.66%
126	Word Ladder II	Python	-	-	-	-	-
127	Word Ladder	Python	-	-	-	-	-
129	Sum Root to Leaf Numbers	Python	$O(n)$	$O(h)$	DFS	97.50%	95.89%
136	Single Number	Python, Java	$O(n)$	$O(1)$	-	100.00%	93.84%
141	Linked List Cycle	Python, Java	$O(n)$	$O(1)$	-	100.00%	95.88%
150	Evaluate Reverse Polish Notation	Python	$O(n)$	$O(n)$	-	-	-
151	Reverse Words in a String	Python	$O(n)$	$O(n)$	-	-	-
155	Min Stack	Python	$O(1)$	$O(n)$	-	-	-
165	Compare Version Numbers	Python	$O(max(n,m))$	$O(n+m)$	-	-	-
168	Excel Sheet Column Title	Python	$O(\log_{26} n)$	$O(1)$	-	-	-
172	Factorial Trailing Zeroes	Python	$O(\log_{5} n)$	$O(\log_{5} n)$	Math	-	-
175	Combine Two Tables	SQL	SQL	SQL	-	-	-
176	Second Highest Salary	SQL	SQL	SQL	-	-	-
177	Nth Highest Salary	SQL	SQL	SQL	-	-	-
178	Rank Scores	SQL	SQL	SQL	-	-	-
180	Consecutive Numbers	SQL	SQL	SQL	-	-	-
181	Employees Earning More Than Their Managers	SQL	SQL	SQL	-	-	-
182	Duplicate Emails	SQL	SQL	SQL	-	-	-
183	Customers Who Never Order	SQL	SQL	SQL	-	-	-
184	Department Highest Salary	SQL	SQL	SQL	-	-	-
185	Department Top Three Salaries	SQL	SQL	SQL	-	-	-
189	Rotate Array	Python, Java	$O(n)$	$O(1)$	-	-	-
190	Reverse Bits	Python, Java	$O(1)$	$O(1)$	-	-	-
191	Number of 1 Bits	Python	$O(\log_{10} n)$	$O(1)$	-	-	-
192	Word Frequency	Shell	SHELL	SHELL	-	-	-
193	Valid Phone Numbers	Shell	SHELL	SHELL	-	-	-
194	Transpose File	Shell	SHELL	SHELL	-	-	-
195	Tenth Line	Shell	SHELL	SHELL	-	-	-
196	Delete Duplicate Emails	SQL	SQL	SQL	-	-	-
197	Rising Temperature	SQL	SQL	SQL	-	-	-
198	House Robber	Python	$O(n)$	$O(n)$	DP	-	-
200	Number of Islands	Python, Java	$O(n*m)$	$O(n*m)$	DFS	-	-
201	Bitwise AND of Numbers Range	Python, Java	$O(\log_{2} n)$	$O(1)$	-	-	-
206	Reverse Linked List	Python	$O(n)$	$O(1)$	-	-	-
207	Course Schedule	Python	-	-	-	-	-
209	Minimum Size Subarray Sum	Python, Java	$O(n)$	$O(1)$	-	-	-
217	Contains Duplicate	Python, Java	$O(n)$	$O(n)$	-	-	-
219	Contains Duplicate II	Python, Java	$O(n)$	$O(n)$	-	-	-
222	Count Complete Tree Nodes	Python	$O(\log_{2}^{2} n)$	$O(\log_{2} n)$	-	-	-
223	Rectangle Area	Python	$O(1)$	$O(1)$	Math	-	-
226	Invert Binary Tree	Python, Java	$O(n)$	$O(n)$	-	-	-
234	Palindrome Linked List	Python	$O(n)$	$O(1)$	-	-	-
235	Lowest Common Ancestor of a Binary Search Tree	Python	$O(n)$	$O(n)$	-	-	-
237	Delete Node in a Linked List	Python, Java	$O(1)$	$O(1)$	-	-	-
242	Valid Anagram	Python	$O(max(n,m))$	$O(n+m)$	-	-	-
258	Add Digits	Python	$O(1)$	$O(1)$	-	-	-
263	Ugly Number	Python	$O(\log_{2} n)$	$O(1)$	-	99.59%	60.80%
278	First Bad Version	Python, Java	$O(\log_{2} n)$	$O(1)$	-	-	-
279	Perfect Squares	Python	$O(n*\sqrt{n})$	$O(n)$	-	-	-
283	Move Zeroes	Python	$O(n)$	$O(1)$	-	-	-
290	Word Pattern	Python	$O(n)$	$O(n)$	-	-	-
292	Nim Game	Python, Java	$O(1)$	$O(1)$	Math	-	-
297	Serialize and Deserialize Binary Tree	Python	$O(n)$	$O(n)$	Preorder	-	-
300	Longest Increasing Subsequence	Python	$O(n*\log_{2} n)$	$O(n)$	-	-	-
304	Range Sum Query 2D - Immutable	Python	$O(n*m) + O(1)$	$O(n*m) + O(1)$	-	-	-
307	Range Sum Query - Mutable	Python	$O(n * \log_{2} n) + O(\log_{2} n)$	$O(n) + O(1)$	-	-	-
326	Power of Three	Python	$O(1)$	$O(1)$	-	-	-
329	Longest Increasing Path in a Matrix	Python	$O(n * m)$	$O(n * m)$	-	-	-
334	Increasing Triplet Subsequence	Python, Java	$O(n)$	$O(1)$	-	-	-
336	Palindrome Pairs	Python	$O(n * k^{2})$	$O(n)$	-	-	-
342	Power of Four	Python	$O(1)$	$O(1)$	-	-	-
345	Reverse Vowels of a String	Python	$O(n)$	$O(n)$	-	-	-
365	Water and Jug Problem	Python	$O(\log_{2} max(n, m))$	$O(\log_{2} max(n, m))$	-	-	-
374	Guess Number Higher or Lower	Python	$O(\log_{2} n)$	$O(1)$	-	75.79%	66.34%
377	Combination Sum IV	Python	$O(2^{n})$	$O(n)$	-	-	-
383	Ransom Note	Python, Java	$O(n+m)$	$O(n+m)$	-	-	-
387	First Unique Character in a String	Python	$O(n)$	$O(1)$	-	-	-
390	Elimination Game	Python, Java	$O(\log_{2} n)$	$O(\log_{2} n)$	-	-	-
393	UTF-8 Validation	Python	$O(n)$	$O(1)$	-	-	-
412	Fizz Buzz	Python, Java	$O(n)$	$O(1)$	-	-	-
417	Pacific Atlantic Water Flow	Python	$O(n * m)$	$O(n * m)$	DFS	-	-
424	Longest Repeating Character Replacement	Python	$O(n)$	$O(1)$	-	-	-
429	N-ary Tree Level Order Traversal	Python	$O(n)$	$O(n)$	-	-	-
433	Minimum Genetic Mutation	Python	$O(n*m^{2})$	$O(n)$	-	-	-
443	String Compression	Python	$O(n)$	$O(1)$	-	-	-
452	Minimum Number of Arrows to Burst Balloons	Python	$O(n * \log_{2} n)$	$O(1)$	Greedy	-	-
463	Island Perimeter	Python, Java	$O(n*m)$	$O(1)$	-	94.28%	94.13%
468	Validate IP Address	Python	$O(1)$	$O(1)$	RegEx	-	-
491	Non-decreasing Subsequences	Python	$O(n^{2})$	$O(n^{2})$	-	-	-
494	Target Sum	Python	$O(n*t)$	$O(n*t)$	-	-	-
495	Teemo Attacking	Python	$O(n)$	$O(1)$	-	-	-
497	Random Point in Non-overlapping Rectangles	Python	$O(n) + O(\log_{2} n)$	$O(n) + O(1)$	-	-	-
506	Relative Ranks	Python	$O(n * \log_{2} n)$	$O(n)$	-	-	-
508	Most Frequent Subtree Sum	Python	$O(n)$	$O(n)$	-	-	-
511	Game Play Analysis I	SQL	SQL	SQL	-	-	-
520	Detect Capital	Python	$O(n)$	$O(1)$	-	-	-
523	Continuous Subarray Sum	Python, Java	$O(n)$	$O(n)$	-	95.90%	91.04%
543	Diameter of Binary Tree	Python	$O(n)$	$O(n)$	-	-	-
547	Number of Provinces	Python	$O(n^{2})$	$O(n)$	DSU	-	-
551	Student Attendance Record I	Python, Java	$O(n)$	$O(1)$	-	100.00%	91.95%
557	Reverse Words in a String III	Python, Java	$O(n)$	$O(n)$	-	99.26%	48.16%
560	Subarray Sum Equals K	Python	$O(n)$	$O(n)$	-	-	-
565	Array Nesting	Python	$O(n)$	$O(n)$	-	-	-
575	Distribute Candies	Python, Java	$O(n)$	$O(n)$	-	-	-
584	Find Customer Referee	SQL	SQL	SQL	-	-	-
586	Customer Placing the Largest Number of Orders	SQL	SQL	SQL	-	-	-
592	Fraction Addition and Subtraction	Python	$O(n)$	$O(n)$	-	-	-
595	Big Countries	SQL	SQL	SQL	-	-	-
596	Classes More Than 5 Students	SQL	SQL	SQL	-	-	-
598	Range Addition II	Python, Java	$O(n)$	$O(1)$	-	-	-
606	Construct String from Binary Tree	Python	$O(n)$	$O(n)$	-	-	-
607	Sales Person	SQL	SQL	SQL	-	-	-
608	Tree Node	SQL	SQL	SQL	-	-	-
609	Find Duplicate File in System	Python	$O(n*k)$	$O(n*k)$	-	-	-
620	Not Boring Movies	SQL	SQL	SQL	-	-	-
622	Design Circular Queue	Python	$O(k) / O(1)$	$O(k) / O(1)$	-	-	-
623	Add One Row to Tree	Python	$O(n)$	$O(n)$	-	-	-
627	Swap Salary	SQL	SQL	SQL	-	-	-
637	Average of Levels in Binary Tree	Python	$O(n)$	$O(\log_{2} n)$	-	-	-
643	Maximum Average Subarray I	Python	$O(n)$	$O(1)$	Sliding Window	-	-
645	Set Mismatch	Python	$O(n)$	$O(1)$	-	92.30%	74.26%
653	Two Sum IV - Input is a BST	Python	$O(n)$	$O(h)$	-	-	-
658	Find K Closest Elements	Python	$O(k + \log_{2} n)$	$O(1)$	Binary Search	-	-
659	Split Array into Consecutive Subsequences	Python	$O(n)$	$O(n)$	-	-	-
680	Valid Palindrome II	Python	$O(n)$	$O(1)$	-	-	-
692	Top K Frequent Words	Python	$O(n * \log_{2} n)$	$O(n)$	-	-	-
695	Max Area of Island	Python	$O(n*m)$	$O(n*m)$	DFS	-	-
696	Count Binary Substrings	Python, Java	$O(n)$	$O(1)$	-	-	-
700	Search in a Binary Search Tree	Python	$O(n)$	$O(1)$	-	-	-
704	Binary Search	Python	$O(\log_{2} n)$	$O(1)$	-	-	-
717	1-bit and 2-bit Characters	Python, Java	$O(n)$	$O(1)$	-	-	-
718	Maximum Length of Repeated Subarray	Python	$O(n*m)$	$O(n*m)$	DP	-	-
733	Flood Fill	Python	$O(n*m)$	$O(n*m)$	DFS	-	-
747	Largest Number At Least Twice of Others	Python	$O(n)$	$O(1)$	-	-	-
748	Shortest Completing Word	Python	$O(n^{2})$	$O(n^{2})$	-	-	-
752	Open the Lock	Python	$O(n)$	$O(n)$	BFS	-	-
766	Toeplitz Matrix	Python	$O(n*m)$	$O(1)$	-	71.85%	99.92%
777	Swap Adjacent in LR String	Python, Java	$O(n)$	$O(1)$	Two Pointers	100.00%	98.78%
788	Rotated Digits	Python	$O(n * \log_{10} n)$	$O(\log_{10} n)$	-	-	-
791	Custom Sort String	Python	$O(n * \log_{2} n)$	$O(n + m)$	-	-	-
797	All Paths From Source to Target	Python	$O(n)$	$O(n)$	-	-	-
802	Find Eventual Safe States	Python	$O(V+E)$	$O(V)$	-	-	-
804	Unique Morse Code Words	Python	$O(n)$	$O(n)$	-	-	-
811	Subdomain Visit Count	Python	$O(n*k)$	$O(n*k)$	-	-	-
814	Binary Tree Pruning	Python	$O(n)$	$O(n)$	-	-	-
823	Binary Trees With Factors	Python	$O(n^{2})$	$O(n)$	-	-	-
830	Positions of Large Groups	Python, Java	$O(n)$	$O(1)$	-	-	-
835	Image Overlap	Python	$O(n^{4})$	$O(1)$	-	97.08%	52.05%
836	Rectangle Overlap	Python	$O(1)$	$O(1)$	Math	-	-
838	Push Dominoes	Python	$O(n)$	$O(n)$	-	-	-
841	Keys and Rooms	Python	$O(n)$	$O(n)$	-	-	-
844	Backspace String Compare	Python	$O(min(n,m))$	$O(1)$	-	-	-
847	Shortest Path Visiting All Nodes	Python	$O(n^{2}*2^{n})$	$O(n*2^{n})$	BFS	-	-
860	Lemonade Change	Python, Java	$O(n)$	$O(1)$	-	-	-
867	Transpose Matrix	Python, Java	$O(n*m)$	$O(1)$	-	-	-
869	Reordered Power of 2	Python	$O({\log_{2} n}^{2})$	$O(\log_{2} n)$	-	-	-
871	Minimum Number of Refueling Stops	Python	$O(n * \log_{2} n)$	$O(n)$	-	-	-
872	Leaf-Similar Trees	Python	$O(H)$	$O(H)$	-	91.29%	87.58%
875	Koko Eating Bananas	Python	$O(n * \log_{2} M)$	$O(1)$	Binary Search	98.57%	62.98%
876	Middle of the Linked List	Python, Java	$O(n)$	$O(1)$	-	100.00%	99.73%
877	Stone Game	Python, Java	$O(1)$	$O(1)$	-	-	-
886	Possible Bipartition	Python	$O(V + E)$	$O(V + E)$	DFS	-	-
890	Find and Replace Pattern	Python	$O(n*k)$	$O(k)$	-	-	-
893	Groups of Special-Equivalent Strings	Python	$O(n * k * \log_{2} k)$	$O(n * k)$	-	93.51%	88.11%
894	All Possible Full Binary Trees	Python	$O(2^{n})$	$O(2^{n})$	-	-	-
895	Maximum Frequency Stack	Python	$O(n)$	$O(n)+O(1)$	-	-	-
896	Monotonic Array	Python	$O(n)$	$O(1)$	-	98.61%	94.23%
904	Fruit Into Baskets	Python	$O(n)$	$O(k)$	-	-	-
921	Minimum Add to Make Parentheses Valid	Python, Java	$O(n)$	$O(1)$	-	-	-
923	3Sum With Multiplicity	Python	$O(k^{2})$	$O(k)$	-	-	-
925	Long Pressed Name	Python, Java	$O(max(n,m))$	$O(1)$	-	-	-
926	Flip String to Monotone Increasing	Python	-	-	-	-	-
930	Binary Subarrays With Sum	Python	$O(n)$	$O(n)$	-	-	-
931	Minimum Falling Path Sum	Python	$O(n * m)$	$O(1)$	DP	40.57%	92.88%
936	Stamping The Sequence	Python	$O(m*(m-n))$	$O(m*(m-n))$	-	-	-
938	Range Sum of BST	Python	$O(n)$	$O(n)$	DFS	-	-
944	Delete Columns to Make Sorted	Python	$O(m * n * \log_{2} n)$	$O(n)$	-	-	-
946	Validate Stack Sequences	Python	$O(n)$	$O(n)$	-	-	-
948	Bag of Tokens	Python	$O(n * \log_{2} n)$	$O(1)$	Two-pointer	-	-
954	Array of Doubled Pairs	Python	-	-	-	-	-
959	Regions Cut By Slashes	Python	$O(n*m)$	$O(n*m)$	DFS	-	-
967	Numbers With Same Consecutive Differences	Python	$O(2^{n})$	$O(2^{n})$	DFS	-	-
976	Largest Perimeter Triangle	Python, Java	$O(n * \log_{2} n)$	$O(1)$	-	-	-
977	Squares of a Sorted Array	Python	$O(n)$	$O(n)$	-	-	-
980	Unique Paths III	Python	-	-	-	-	-
982	Triples with Bitwise AND Equal To Zero	Python	$O(n^{3})$	$O(n^{2})$	-	-	-
985	Sum of Even Numbers After Queries	Python, Java	$O(n + m)$	$O(1)$	-	-	-
986	Interval List Intersections	Python	$O(n+m)$	$O(n+m)$	-	-	-
988	Smallest String Starting From Leaf	Python	$O(n)$	$O(n)$	DFS	-	-
989	Add to Array-Form of Integer	Python	$O(\log_{10} k)$	$O(1)$	-	-	-
990	Satisfiability of Equality Equations	Python	$O(n)$	$O(n)$	-	-	-
997	Find the Town Judge	Python	$O(n)$	$O(n)$	-	-	-
998	Maximum Binary Tree II	Python	$O(n)$	$O(n)$	-	-	-
999	Available Captures for Rook	Python	$O(1)$	$O(1)$	-	-	-
1006	Clumsy Factorial	Python	$O(1)$	$O(1)$	-	96.15%	97.93%
1007	Minimum Domino Rotations For Equal Row	Python	$O(n)$	$O(1)$	-	-	-
1010	Pairs of Songs With Total Durations Divisible by 60	Python, Java	$O(n)$	$O(1)$	-	96.43%	85.53%
1020	Number of Enclaves	Python	$O(n*m)$	$O(n*m)$	DFS	-	-
1026	Maximum Difference Between Node and Ancestor	Python	$O(n)$	$O(n)$	-	-	-
1030	Matrix Cells in Distance Order	Python	-	-	-	-	-
1039	Minimum Score Triangulation of Polygon	Python	$O(n^{2})$	$O(n^{2})$	DP	-	-
1047	Remove All Adjacent Duplicates In String	Python	$O(n)$	$O(n)$	Stack	-	-
1048	Longest String Chain	Python	$O(n*k^{2})$	$O(n)$	-	-	-
1050	Actors and Directors Who Cooperated At Least Three Times	SQL	SQL	SQL	-	-	-
1071	Greatest Common Divisor of Strings	Python	$O(n+m)$	$O(n+m)$	-	-	-
1084	Sales Analysis III	SQL	SQL	SQL	-	-	-
1091	Shortest Path in Binary Matrix	Python	$O(n^{2})$	$O(n^{2})$	BFS	-	-
1104	Path In Zigzag Labelled Binary Tree	Python	$O(\log_{2} n)$	$O(1)$	-	67.53%	73.43%
1114	Print in Order	Python	CONCURRENCY	CONCURRENCY	-	-	-
1131	Maximum of Absolute Value Expression	Python	$O(n)$	$O(n)$	-	-	-
1137	N-th Tribonacci Number	Python	$O(n)$	$O(1)$	-	-	-
1141	User Activity for the Past 30 Days I	SQL	SQL	SQL	-	-	-
1143	Longest Common Subsequence	Python	$O(n * m)$	$O(n * m)$	DP	96.32%	81.56%
1148	Article Views I	SQL	SQL	SQL	-	-	-
1155	Number of Dice Rolls With Target Sum	Python	$O(n*k)$	$O(n*k)$	DP	-	-
1158	Market Analysis I	SQL	SQL	SQL	-	-	-
1162	As Far from Land as Possible	Python	$O(n*m)$	$O(n*m)$	-	-	-
1179	Reformat Department Table	SQL	SQL	SQL	-	-	-
1184	Distance Between Bus Stops	Python	$O(n)$	$O(1)$	-	-	-
1207	Unique Number of Occurrences	Python	$O(n)$	$O(n)$	-	95.89%	72.74%
1220	Count Vowels Permutation	Python	$O(n)$	$O(1)$	DP	-	-
1237	Find Positive Integer Solution for a Given Equation	Python	$O(N + M)$	$O(1)$	-	100.00%	33.63%
1239	Maximum Length of a Concatenated String with Unique Characters	Python	$O(n^{2})$	$O(n^{2})$	DP	94.14%	8.30%
1249	Minimum Remove to Make Valid Parentheses	Python	$O(n)$	$O(n)$	-	-	-
1254	Number of Closed Islands	Python	$O(n*m)$	$O(n*m)$	DFS	-	-
1260	Shift 2D Grid	Python	$O(n^{2})$	$O(n^{2})$	-	-	-
1275	Find Winner on a Tic Tac Toe Game	Python, Java	$O(1)$	$O(1)$	-	-	-
1306	Jump Game III	Python	$O(n)$	$O(1)$	-	-	-
1319	Number of Operations to Make Network Connected	Python	$O(n)$	$O(n)$	-	-	-
1323	Maximum 69 Number	Python	$O(n)$	$O(n)$	-	-	-
1328	Break a Palindrome	Python	$O(n)$	$O(n)$	-	-	-
1329	Sort the Matrix Diagonally	Python	-	-	-	-	-
1331	Rank Transform of an Array	Python	$O(n * \log_{2} n)$	$O(n)$	-	-	-
1332	Remove Palindromic Subsequences	Python, Java	$O(n)$	$O(1)$	-	-	-
1334	Find the City With the Smallest Number of Neighbors at a Threshold Distance	Python, Java	$O(n^{3})$	$O(n^{2})$	Floyd-Warshall's	100.00%	95.65%
1338	Reduce Array Size to The Half	Python	$O(n * \log_{2} n)$	$O(n)$	-	-	-
1342	Number of Steps to Reduce a Number to Zero	Python	$O(1)$	$O(1)$	Bit Manipulation	96.74%	95.47%
1345	Jump Game IV	Python	-	-	-	-	-
1347	Minimum Number of Steps to Make Two Strings Anagram	Python	$O(n)$	$O(1)$	-	-	-
1376	Time Needed to Inform All Employees	Python	$O(n)$	$O(n)$	DFS	-	-
1381	Design a Stack With Increment Operation	Python	-	-	-	-	-
1383	Maximum Performance of a Team	Python	$O(n * \log_{2} n)$	$O(n)$	-	-	-
1387	Sort Integers by The Power Value	Python	$O(n * \log_{2} n)$	$O(n)$	-	-	-
1393	Capital Gain/Loss	SQL	SQL	SQL	-	-	-
1407	Top Travellers	SQL	SQL	SQL	-	-	-
1408	String Matching in an Array	Python	$O(n^{2}*k^{2})$	$O(1)$	-	-	-
1414	Find the Minimum Number of Fibonacci Numbers Whose Sum Is K	Python	$O(\log_{2} k)$	$O(\log_{2} k)$	-	-	-
1423	Maximum Points You Can Obtain from Cards	Python	$O(n)$	$O(1)$	Sliding Window	-	-
1437	Check If All 1's Are at Least Length K Places Away	Python, Java	$O(n)$	$O(1)$	-	-	-
1448	Count Good Nodes in Binary Tree	Python	$O(n)$	$O(n)$	DFS	-	-
1457	Pseudo-Palindromic Paths in a Binary Tree	Python, Java	$O(n)$	$O(n)$	DFS	-	-
1466	Reorder Routes to Make All Paths Lead to the City Zero	Python	$O(n)$	$O(n)$	DFS	-	-
1470	Shuffle the Array	Python, Java	$O(n)$	$O(1)$	-	-	-
1472	Design Browser History	Python	-	-	-	-	-
1480	Running Sum of 1d Array	Python	$O(n)$	$O(1)$	-	-	-
1484	Group Sold Products By The Date	SQL	SQL	SQL	-	-	-
1493	Longest Subarray of 1's After Deleting One Element	Python, Java	$O(n)$	$O(1)$	-	-	-
1496	Path Crossing	Python	$O(n)$	$O(n)$	-	-	-
1513	Number of Substrings With Only 1s	Python	$O(n)$	$O(1)$	-	92.33%	100.00%
1523	Count Odd Numbers in an Interval Range	Python	-	-	-	-	-
1527	Patients With a Condition	SQL	SQL	SQL	-	-	-
1539	Kth Missing Positive Number	Python	$O(n)$	$O(n)$	-	-	-
1544	Make The String Great	Python	$O(n)$	$O(n)$	Stack	94.50%	97.99%
1557	Minimum Number of Vertices to Reach All Nodes	Python, Java	$O(n)$	$O(n)$	-	-	-
1576	Replace All ?'s to Avoid Consecutive Repeating Characters	Python	$O(n)$	$O(n)$	-	-	-
1578	Minimum Time to Make Rope Colorful	Python	$O(n)$	$O(1)$	-	-	-
1581	Customer Who Visited but Did Not Make Any Transactions	SQL	SQL	SQL	-	-	-
1587	Bank Account Summary II	SQL	SQL	SQL	-	-	-
1646	Get Maximum in Generated Array	Python	$O(n)$	$O(n)$	-	-	-
1657	Determine if Two Strings Are Close	Python	$O(n)$	$O(n)$	Sorting	89.60%	94.00%
1662	Check If Two String Arrays are Equivalent	Python	$O(n)$	$O(1)$	-	99.41%	98.50%
1663	Smallest String With A Given Numeric Value	Python	$O(n)$	$O(n)$	-	-	-
1667	Fix Names in a Table	SQL	SQL	SQL	-	-	-
1669	Merge In Between Linked Lists	Python	$O(n + m)$	$O(1)$	-	-	-
1672	Richest Customer Wealth	Python, Java	$O(n*m)$	$O(1)$	-	-	-
1680	Concatenation of Consecutive Binary Numbers	Python	$O(n*\log_{2} n)$	$O(1)$	-	-	-
1684	Count the Number of Consistent Strings	Python	$O(n+m)$	$O(n+m)$	-	-	-
1693	Daily Leads and Partners	SQL	SQL	SQL	-	-	-
1729	Find Followers Count	SQL	SQL	SQL	-	-	-
1741	Find Total Time Spent by Each Employee	SQL	SQL	SQL	-	-	-
1752	Check if Array Is Sorted and Rotated	Python	$O(n)$	$O(1)$	-	-	-
1757	Recyclable and Low Fat Products	SQL	SQL	SQL	-	-	-
1770	Maximum Score from Performing Multiplication Operations	Python	$O(m^{2})$	$O(m)$	DP	-	-
1784	Check if Binary String Has at Most One Segment of Ones	Python, Java	$O(n)$	$O(1)$	-	-	-
1795	Rearrange Products Table	SQL	SQL	SQL	-	-	-
1817	Finding the Users Active Minutes	Python	$O(n)$	$O(n + k)$	Hashing	-	-
1832	Check if the Sentence Is Pangram	Python, Java	$O(n)$	$O(1)$	-	92.75%	95.79%
1833	Maximum Ice Cream Bars	Python	$O(sort)$	$O(n)$	-	-	-
1839	Longest Substring Of All Vowels in Order	Python	$O(n)$	$O(1)$	-	-	-
1848	Minimum Distance to the Target Element	Python	$O(n)$	$O(1)$	-	-	-
1869	Longer Contiguous Segments of Ones than Zeros	Python	-	-	-	-	-
1873	Calculate Special Bonus	SQL	SQL	SQL	-	-	-
1876	Substrings of Size Three with Distinct Characters	Python, Java	$O(n)$	$O(min(n,k))$	Sliding Window	-	-
1890	The Latest Login in 2020	SQL	SQL	SQL	-	-	-
1903	Largest Odd Number in String	Python	$O(n)$	$O(1)$	-	-	-
1905	Count Sub Islands	Python	$O(n^{2})$	$O(n^{2})$	DFS	-	-
1926	Nearest Exit from Entrance in Maze	Python	$O(n * m)$	$O(n * m)$	BFS	77.25%	55.57%
1945	Sum of Digits of String After Convert	Python	$O(n)$	$O(n)$	-	-	-
1962	Remove Stones to Minimize the Total	Python	$O(n * \log_{2} n)$	$O(1)$	Heap	100.00%	95.88%
1965	Employees With Missing Information	SQL	SQL	SQL	-	-	-
1979	Find Greatest Common Divisor of Array	Python, Java	$O(n)$	$O(1)$	GCD	-	-
1984	Minimum Difference Between Highest and Lowest of K Scores	Python	$O(n*\log_{2} n)$	$O(1)$	-	-	-
1996	The Number of Weak Characters in the Game	Python	$O(n * \log_{2} n)$	$O(n)$	-	-	-
2007	Find Original Array From Doubled Array	Python, Java	$O(n+k*\log_{2}k)$	$O(k)$	-	-	-
2022	Convert 1D Array Into 2D Array	Python, Java	$O(n*m)$	$O(1)$	-	-	-
2078	Two Furthest Houses With Different Colors	Python, Java	$O(n)$	$O(1)$	-	-	-
2095	Delete the Middle Node of a Linked List	Python	$O(n)$	$O(1)$	-	-	-
2131	Longest Palindrome by Concatenating Two Letter Words	Python	-	-	-	-	-
2136	Earliest Possible Day of Full Bloom	Python	$O(n * \log_{2} n)$	$O(n)$	-	-	-
2185	Counting Words With a Given Prefix	Python	$O(n*k)$	$O(1)$	-	-	-
2186	Minimum Number of Steps to Make Two Strings Anagram II	Python	$O(n+m)$	$O(n+m)$	-	-	-
2220	Minimum Bit Flips to Convert Number	Python, Java	$O(\log_{2} n)$	$O(1)$	-	100.00%	97.83%
2225	Find Players With Zero or One Losses	Python	$O(n * \log_{2} n)$	$O(n)$	-	98.66%	99.40%
2243	Calculate Digit Sum of a String	Python	$O(\log_{k} n)$	$O(\log_{k} n)$	-	-	-
2244	Minimum Rounds to Complete All Tasks	Python	$O(n)$	$O(n)$	Counting	-	-
2255	Count Prefixes of a Given String	Python	$O(n*m)$	$O(n*m)$	-	-	-
2264	Largest 3-Same-Digit Number in String	Python	$O(n)$	$O(1)$	-	-	-
2269	Find the K-Beauty of a Number	Python	$O(\log_{10} n)$	$O(1)$	-	-	-
2273	Find Resultant Array After Removing Anagrams	Python	$O(n*k)$	$O(k)$	-	-	-
2278	Percentage of Letter in String	Python, Java	$O(n)$	$O(1)$	-	-	-
2279	Maximum Bags With Full Capacity of Rocks	Python	$O(n * \log_{2} n)$	$O(n)$	Greedy	99.67%	87.83%
2294	Partition Array Such That Maximum Difference Is K	Python, Java	$O(n * \log_{2} n)$	$O(1)$	-	-	-
2299	Strong Password Checker II	Python	$O(n)$	$O(1)$	-	-	-
2309	Greatest English Letter in Upper and Lower Case	Python	$O(1)$	$O(1)$	-	-	-
2315	Count Asterisks	Python	$O(n)$	$O(1)$	-	-	-
2316	Count Unreachable Pairs of Nodes in an Undirected Graph	Python	$O(n)$	$O(n)$	-	-	-
2331	Evaluate Boolean Binary Tree	Python	$O(n)$	$O(n)$	-	-	-
2335	Minimum Amount of Time to Fill Cups	Python	$O(1)$	$O(1)$	-	-	-
2336	Smallest Number in Infinite Set	Python	$O(1) + O(\log_{2} n)$	$O(n)$	-	-	-
2337	Move Pieces to Obtain a String	Python, Java	$O(n)$	$O(1)$	Two Pointers	86.68%	99.25%
2341	Maximum Number of Pairs in Array	Python	$O(n)$	$O(n)$	-	-	-
2347	Best Poker Hand	Python	$O(1)$	$O(1)$	-	-	-
2348	Number of Zero-Filled Subarrays	Python	$O(n)$	$O(1)$	Sliding Window	-	-
2351	First Letter to Appear Twice	Python, Java	$O(n)$	$O(1)$	-	100.00%	94.36%
2352	Equal Row and Column Pairs	Python	$O(n^{3}) / O(n^{2})$	$O(1) / O(n)$	-	-	-
2357	Make Array Zero by Subtracting Equal Amounts	Python	$O(n)$	$O(n)$	-	-	-
2359	Find Closest Node to Given Two Nodes	Python	$O(n)$	$O(n)$	DFS	-	-
2363	Merge Similar Items	Python	$O(n*\log_{2} n)$	$O(n)$	-	-	-
2364	Count Number of Bad Pairs	Python	$O(n)$	$O(n)$	-	-	-
2367	Number of Arithmetic Triplets	Python	$O(n)$	$O(n)$	-	-	-
2373	Largest Local Values in a Matrix	Python	$O(n^{2})$	$O(1)$	-	-	-
2374	Node With Highest Edge Score	Python	$O(n)$	$O(n)$	-	-	-
2379	Minimum Recolors to Get K Consecutive Black Blocks	Python	$O(n)$	$O(k)$	-	-	-
2380	Time Needed to Rearrange a Binary String	Python	$O(n)$	$O(1)$	-	-	-
2383	Minimum Hours of Training to Win a Competition	Python, Java	$O(n)$	$O(1)$	-	-	-
2384	Largest Palindromic Number	Python	$O(1)$	$O(1)$	-	-	-
2389	Longest Subsequence With Limited Sum	Python	$O(n*\log_{2} n)$	$O(n)$	-	-	-
2390	Removing Stars From a String	Python	-	-	-	-	-
2391	Minimum Amount of Time to Collect Garbage	Python	$O(n)$	$O(1)$	-	-	-
2395	Find Subarrays With Equal Sum	Python	$O(n)$	$O(n)$	-	-	-
2396	Strictly Palindromic Number	Python	$O(1)$	$O(1)$	-	-	-
2399	Check Distances Between Same Letters	Python	$O(1)$	$O(1)$	-	-	-
2401	Longest Nice Subarray	Python, Java	$O(n)$	$O(1)$	Sliding Window	-	-
2404	Most Frequent Even Element	Python, Java	$O(n)$	$O(n)$	-	-	-
2405	Optimal Partition of String	Python, Java	$O(n)$	$O(1)$	-	-	-
2406	Divide Intervals Into Minimum Number of Groups	Python	$O(n)$	$O(n)$	-	-	-
2409	Count Days Spent Together	Python	$O(1)$	$O(1)$	-	-	-
2413	Smallest Even Multiple	Python, Java	$O(1)$	$O(1)$	-	-	-
2414	Length of the Longest Alphabetical Continuous Substring	Python	$O(n)$	$O(1)$	-	-	-
2418	Sort the People	Python	$O(n * \log_{2} n)$	$O(n)$	-	-	-
2419	Longest Subarray With Maximum Bitwise AND	Python	$O(n)$	$O(1)$	-	-	-
2424	Longest Uploaded Prefix	Python	$O(1)$	$O(n)$	-	-	-
2427	Number of Common Factors	Python	$O(min(n,m))$	$O(1)$	-	-	-
2428	Maximum Sum of an Hourglass	Python	$O(n*m)$	$O(n*m)$	-	-	-
2432	The Employee That Worked on the Longest Task	Python	$O(n)$	$O(1)$	-	-	-
2433	Find The Original Array of Prefix Xor	Python, Java	$O(n)$	$O(1)$	-	-	-
2441	Largest Positive Integer That Exists With Its Negative	Python	$O(n) / O(n * \log_{2} n)$	$O(n) / O(1)$	-	98.91%	99.35%
2442	Count Number of Distinct Integers After Reverse Operations	Python, Java	$O(n)$	$O(n)$	-	99.69%	96.65%
2446	Determine if Two Events Have Conflict	Python	$O(1)$	$O(1)$	-	89.91%	75.19%
2447	Number of Subarrays With GCD Equal to K	Python, Java	$O(n^{2} * \log_{2} m)$	$O(1)$	GCD	98.08%	95.20%
2448	Minimum Cost to Make Array Equal	Python, Java	$O(n * \log_{2} m)$	$O(1)$	Binary Search	99.41%	98.81%
2455	Average Value of Even Numbers That Are Divisible by Three	Python	$O(n)$	$O(1)$	-	100.00%	85.71%
2482	Difference Between Ones and Zeros in Row and Column	Python	$O(n * m)$	$O(n + m)$	-	-	-
2485	Find the Pivot Integer	Python	$O(√n)$	$O(1)$	Math	99.78%	97.40%
2487	Remove Nodes From Linked List	Python	-	-	-	-	-
2490	Circular Sentence	Python	$O(n)$	$O(1)$	-	-	-
2491	Divide Players Into Teams of Equal Skill	Python	-	-	-	-	-
2501	Longest Square Streak in an Array	Python	$O(n * √n)$	$O(n)$	-	-	-
2506	Count Pairs Of Similar Strings	Python	$O(n*m)$	$O(1)$	-	-	-
2522	Partition String Into Substrings With Values at Most K	Python	-	-	-	-	-
2525	Categorize Box According to Criteria	Python	$O(1)$	$O(1)$	-	-	-
2529	Maximum Count of Positive Integer and Negative Integer	Python	$O(\log_{2} n)$	$O(1)$	-	-	-
2549	Count Distinct Numbers on Board	Python	-	-	-	-	-
2563	Count the Number of Fair Pairs	Python	-	-	-	-	-
2574	Left and Right Sum Differences	Python	-	-	-	-	-

Last update

Solution table for problems was generated automatically on 2024-03-31 06:06 +0000