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C#-based LeetCode algorithm problem solutions, regularly updated.

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LeetCode-in-Net/LeetCode-in-Net.github.io

 
 

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"For coding interview preparation, LeetCode is one of the best online resource providing a rich library of more than 300 real coding interview questions for you to practice from using one of the 7 supported languages - C, C++, Java, Python, C#, JavaScript, Ruby."

Binary Search II

Day 1

Day 2

Day 3

0300Longest Increasing SubsequenceMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n)8089.11

Day 4

Day 5

0287Find the Duplicate NumberMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Two_Pointers, Bit_Manipulation, Big_O_Time_O(n)_Space_O(n)25730.11

Day 6

Day 7

Day 8

0240Search a 2D Matrix IIMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Matrix, Divide_and_Conquer, Big_O_Time_O(n+m)_Space_O(1)14260.76

Day 9

Day 10

Day 11

Day 12

Day 13

Day 14

Day 15

Day 16

Day 17

Day 18

Day 19

Day 20

Dynamic Programming I

Day 1

Day 2

0070Climbing StairsEasyTop_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n)1594.90

Day 3

Day 4

0055Jump GameMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)18938.02
0045Jump Game IIMediumTop_100_Liked_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)14415.35

Day 5

0053Maximum SubarrayEasyTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)27620.05

Day 6

Day 7

Day 8

Day 9

0042Trapping Rain WaterHardTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Two_Pointers, Stack, Monotonic_Stack, Big_O_Time_O(n)_Space_O(1)8189.96

Day 10

Day 11

0096Unique Binary Search TreesMediumTop_100_Liked_Questions, Dynamic_Programming, Math, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(n)_Space_O(1)1398.48

Day 12

Day 13

Day 14

Day 15

0062Unique PathsMediumTop_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Combinatorics, Big_O_Time_O(m*n)_Space_O(m*n)1693.42

Day 16

0064Minimum Path SumMediumTop_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Big_O_Time_O(m*n)_Space_O(m*n)7494.37

Day 17

0005Longest Palindromic SubstringMediumTop_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)6199.50

Day 18

0300Longest Increasing SubsequenceMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n)8089.11

Day 19

1143Longest Common SubsequenceMediumTop_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n*m)_Space_O(n*m)5990.45
0072Edit DistanceHardTop_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n2)5195.38

Day 20

0322Coin ChangeMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Breadth_First_Search, Big_O_Time_O(m*n)_Space_O(amount)7890.63

Day 21

Programming Skills I

Day 1 Basic Data Type

Day 2 Operator

Day 3 Conditional Statements

Day 4 Loop

Day 5 Function

Day 6 Array

0283Move ZeroesEasyTop_100_Liked_Questions, Top_Interview_Questions, Array, Two_Pointers, Big_O_Time_O(n)_Space_O(1)13396.30

Day 7 Array

Day 8 String

Day 9 String

Day 10 Linked List and Tree

Day 11 Containers and Libraries

Day 12 Class and Object

Programming Skills II

Day 1

Day 2

Day 3

Day 4

Day 5

Day 6

0739Daily TemperaturesMediumTop_100_Liked_Questions, Array, Stack, Monotonic_Stack, Big_O_Time_O(n)_Space_O(n)37644.29

Day 7

0048Rotate ImageMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Big_O_Time_O(n^2)_Space_O(1)9297.78

Day 8

Day 9

Day 10

Day 11

0049Group AnagramsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Big_O_Time_O(n*k_log_k)_Space_O(n)14596.20

Day 12

0438Find All Anagrams in a StringMediumTop_100_Liked_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n+m)_Space_O(1)10397.89

Day 13

Day 14

Day 15

0002Add Two NumbersMediumTop_100_Liked_Questions, Top_Interview_Questions, Math, Linked_List, Recursion, Big_O_Time_O(max(N,M))_Space_O(max(N,M))8477.30

Day 16

Day 17

Day 18

Day 19

Day 20

Graph Theory I

Day 1 Matrix Related Problems

Day 2 Matrix Related Problems

Day 3 Matrix Related Problems

Day 4 Matrix Related Problems

Day 5 Matrix Related Problems

Day 6 Matrix Related Problems

Day 7 Standard Traversal

Day 8 Standard Traversal

Day 9 Standard Traversal

Day 10 Standard Traversal

Day 11 Breadth First Search

Day 12 Breadth First Search

Day 13 Graph Theory

Day 14 Graph Theory

SQL I

Day 1 Select

Day 2 Select and Order

Day 3 String Processing Functions

Day 4 Union and Select

Day 5 Union

Day 6 Union

Day 7 Function

Day 8 Function

Day 9 Control of Flow

Day 10 Where

Level 1

Day 1 Prefix Sum

Day 2 String

Day 3 Linked List

0021Merge Two Sorted ListsEasyTop_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(m+n)_Space_O(m+n)6992.74

Day 4 Linked List

Day 5 Greedy

Day 6 Tree

Day 7 Binary Search

Day 8 Binary Search Tree

0098Validate Binary Search TreeMediumTop_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(N)_Space_O(log(N))7597.31

Day 9 Graph/BFS/DFS

Day 10 Dynamic Programming

0070Climbing StairsEasyTop_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n)1594.90

Day 11 Dynamic Programming

0062Unique PathsMediumTop_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Combinatorics, Big_O_Time_O(m*n)_Space_O(m*n)1693.42

Day 12 Sliding Window/Two Pointer

0438Find All Anagrams in a StringMediumTop_100_Liked_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n+m)_Space_O(1)10397.89

Day 13 Hashmap

0001Two SumEasyTop_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n)13481.26

Day 14 Stack

0394Decode StringMediumTop_100_Liked_Questions, String, Stack, Recursion, Big_O_Time_O(n)_Space_O(n)4499.55

Day 15 Heap

Level 2

Day 1 Implementation/Simulation

Day 2 String

Day 3 Linked List

0019Remove Nth Node From End of ListMediumTop_100_Liked_Questions, Top_Interview_Questions, Two_Pointers, Linked_List, Big_O_Time_O(L)_Space_O(L)6990.79

Day 4 Linked List

Day 5 Greedy

Day 6 Tree

Day 7 Tree

0543Diameter of Binary TreeEasyTop_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)7484.67
0437Path Sum IIIMediumTop_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)7697.16

Day 8 Binary Search

0074Search a 2D MatrixMediumTop_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)7690.98
0033Search in Rotated Sorted ArrayMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)6396.89

Day 9 Binary Search Tree

Day 10 Graph/BFS/DFS

Day 11 Graph/BFS/DFS

Day 12 Dynamic Programming

0322Coin ChangeMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Breadth_First_Search, Big_O_Time_O(m*n)_Space_O(amount)7890.63

Day 13 Dynamic Programming

0416Partition Equal Subset SumMediumTop_100_Liked_Questions, Array, Dynamic_Programming, Big_O_Time_O(n*sums)_Space_O(n*sums)9597.38

Day 14 Sliding Window/Two Pointer

0003Longest Substring Without Repeating CharactersMediumTop_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n)_Space_O(1)5098.40
0076Minimum Window SubstringHardTop_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(s.length())_Space_O(1)5698.72

Day 15 Tree

0101Symmetric TreeEasyTop_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(log(N))6497.79

Day 16 Design

Day 17 Interval

0056Merge IntervalsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Big_O_Time_O(n_log_n)_Space_O(n)14989.48

Day 18 Stack

Day 19 Union Find

Day 20 Brute Force/Backtracking

0039Combination SumMediumTop_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(2^n)_Space_O(n+2^n)9499.60
0046PermutationsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Big_O_Time_O(n*n!)_Space_O(n+n!)1485.56

Udemy

Udemy Integers

0007Reverse IntegerMediumTop_Interview_Questions, Math2359.02
0009Palindrome NumberEasyMath4234.61

Udemy Strings

0003Longest Substring Without Repeating CharactersMediumTop_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n)_Space_O(1)5098.40
0020Valid ParenthesesEasyTop_100_Liked_Questions, Top_Interview_Questions, String, Stack, Big_O_Time_O(n)_Space_O(n)5396.68
0005Longest Palindromic SubstringMediumTop_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)6199.50
0394Decode StringMediumTop_100_Liked_Questions, String, Stack, Recursion, Big_O_Time_O(n)_Space_O(n)4499.55
0049Group AnagramsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Big_O_Time_O(n*k_log_k)_Space_O(n)14596.20

Udemy Binary Search

0033Search in Rotated Sorted ArrayMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)6396.89

Udemy Arrays

0283Move ZeroesEasyTop_100_Liked_Questions, Top_Interview_Questions, Array, Two_Pointers, Big_O_Time_O(n)_Space_O(1)13396.30
0001Two SumEasyTop_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n)13481.26
0055Jump GameMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)18938.02
0075Sort ColorsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n)_Space_O(1)9893.59
0041First Missing PositiveHardTop_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n)19213.98
0239Sliding Window MaximumHardTop_100_Liked_Questions, Top_Interview_Questions, Array, Heap_Priority_Queue, Sliding_Window, Queue, Monotonic_Queue, Big_O_Time_O(n*k)_Space_O(n+k)49346.05

Udemy Two Pointers

0042Trapping Rain WaterHardTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Two_Pointers, Stack, Monotonic_Stack, Big_O_Time_O(n)_Space_O(1)8189.96
00153SumMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2)17375.85

Udemy Famous Algorithm

0053Maximum SubarrayEasyTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)27620.05

Udemy Sorting Algorithms

Udemy 2D Arrays/Matrix

0074Search a 2D MatrixMediumTop_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)7690.98
0048Rotate ImageMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Big_O_Time_O(n^2)_Space_O(1)9297.78
0073Set Matrix ZeroesMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Matrix, Big_O_Time_O(m*n)_Space_O(1)12496.92
0056Merge IntervalsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Big_O_Time_O(n_log_n)_Space_O(n)14989.48

Udemy Linked List

0024Swap Nodes in PairsMediumTop_100_Liked_Questions, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(1)5898.51
0021Merge Two Sorted ListsEasyTop_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(m+n)_Space_O(m+n)6992.74
0025Reverse Nodes in k-GroupHardTop_100_Liked_Questions, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(k)7586.97

Udemy Tree Stack Queue

0094Binary Tree Inorder TraversalEasyTop_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Big_O_Time_O(n)_Space_O(n)9099.30
0543Diameter of Binary TreeEasyTop_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)7484.67
0098Validate Binary Search TreeMediumTop_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(N)_Space_O(log(N))7597.31

Udemy Trie and Heap

Udemy Graph

Udemy Dynamic Programming

0070Climbing StairsEasyTop_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n)1594.90
0064Minimum Path SumMediumTop_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Big_O_Time_O(m*n)_Space_O(m*n)7494.37
0300Longest Increasing SubsequenceMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n)8089.11
1143Longest Common SubsequenceMediumTop_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n*m)_Space_O(n*m)5990.45
0072Edit DistanceHardTop_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n2)5195.38
0010Regular Expression MatchingHardTop_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Recursion, Big_O_Time_O(m*n)_Space_O(m*n)5996.10

Udemy Backtracking/Recursion

0022Generate ParenthesesMediumTop_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Big_O_Time_O(2^n)_Space_O(n)8199.57
0039Combination SumMediumTop_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(2^n)_Space_O(n+2^n)9499.60
0078SubsetsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Backtracking, Big_O_Time_O(2^n)_Space_O(n*2^n)10194.29
0017Letter Combinations of a Phone NumberMediumTop_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Backtracking, Big_O_Time_O(4^n)_Space_O(n)10895.24
0046PermutationsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Big_O_Time_O(n*n!)_Space_O(n+n!)1485.56

Udemy Bit Manipulation

0338Counting BitsEasyTop_100_Liked_Questions, Dynamic_Programming, Bit_Manipulation, Big_O_Time_O(num)_Space_O(num)6798.82

Udemy Design

Data Structure I

Day 1 Array

0053Maximum SubarrayEasyTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)27620.05

Day 2 Array

0001Two SumEasyTop_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n)13481.26

Day 3 Array

Day 4 Array

Day 5 Array

0074Search a 2D MatrixMediumTop_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)7690.98

Day 6 String

Day 7 Linked List

0021Merge Two Sorted ListsEasyTop_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(m+n)_Space_O(m+n)6992.74

Day 8 Linked List

Day 9 Stack Queue

0020Valid ParenthesesEasyTop_100_Liked_Questions, Top_Interview_Questions, String, Stack, Big_O_Time_O(n)_Space_O(n)5396.68

Day 10 Tree

0094Binary Tree Inorder TraversalEasyTop_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Big_O_Time_O(n)_Space_O(n)9099.30

Day 11 Tree

0101Symmetric TreeEasyTop_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(log(N))6497.79

Day 12 Tree

Day 13 Tree

Day 14 Tree

0098Validate Binary Search TreeMediumTop_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(N)_Space_O(log(N))7597.31

Data Structure II

Day 1 Array

00153SumMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2)17375.85

Day 2 Array

0075Sort ColorsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n)_Space_O(1)9893.59
0056Merge IntervalsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Big_O_Time_O(n_log_n)_Space_O(n)14989.48

Day 3 Array

0048Rotate ImageMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Big_O_Time_O(n^2)_Space_O(1)9297.78

Day 4 Array

0240Search a 2D Matrix IIMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Matrix, Divide_and_Conquer, Big_O_Time_O(n+m)_Space_O(1)14260.76

Day 5 Array

0560Subarray Sum Equals KMediumTop_100_Liked_Questions, Array, Hash_Table, Prefix_Sum, Big_O_Time_O(n)_Space_O(n)13546.56

Day 6 String

Day 7 String

0763Partition LabelsMediumTop_100_Liked_Questions, String, Hash_Table, Greedy, Two_Pointers, Big_O_Time_O(n)_Space_O(1)8298.72

Day 8 String

0049Group AnagramsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Big_O_Time_O(n*k_log_k)_Space_O(n)14596.20

Day 9 String

0005Longest Palindromic SubstringMediumTop_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)6199.50

Day 10 Linked List

0002Add Two NumbersMediumTop_100_Liked_Questions, Top_Interview_Questions, Math, Linked_List, Recursion, Big_O_Time_O(max(N,M))_Space_O(max(N,M))8477.30

Day 11 Linked List

Day 12 Linked List

0024Swap Nodes in PairsMediumTop_100_Liked_Questions, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(1)5898.51

Day 13 Linked List

0025Reverse Nodes in k-GroupHardTop_100_Liked_Questions, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(k)7586.97

Day 14 Stack Queue

Day 15 Tree

Day 16 Tree

Day 17 Tree

Day 18 Tree

Day 19 Graph

Day 20 Heap Priority Queue

0347Top K Frequent ElementsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Sorting, Heap_Priority_Queue, Counting, Divide_and_Conquer, Quickselect, Bucket_Sort, Big_O_Time_O(n*log(n))_Space_O(k)12595.29

Day 21 Heap Priority Queue

Algorithm I

Day 1 Binary Search

0035Search Insert PositionEasyTop_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)1066.17

Day 2 Two Pointers

Day 3 Two Pointers

0283Move ZeroesEasyTop_100_Liked_Questions, Top_Interview_Questions, Array, Two_Pointers, Big_O_Time_O(n)_Space_O(1)13396.30

Day 4 Two Pointers

Day 5 Two Pointers

0019Remove Nth Node From End of ListMediumTop_100_Liked_Questions, Top_Interview_Questions, Two_Pointers, Linked_List, Big_O_Time_O(L)_Space_O(L)6990.79

Day 6 Sliding Window

0003Longest Substring Without Repeating CharactersMediumTop_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n)_Space_O(1)5098.40

Day 7 Breadth First Search Depth First Search

Day 8 Breadth First Search Depth First Search

Day 9 Breadth First Search Depth First Search

Day 10 Recursion Backtracking

0021Merge Two Sorted ListsEasyTop_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(m+n)_Space_O(m+n)6992.74

Day 11 Recursion Backtracking

0046PermutationsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Big_O_Time_O(n*n!)_Space_O(n+n!)1485.56

Day 12 Dynamic Programming

0070Climbing StairsEasyTop_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n)1594.90

Day 13 Bit Manipulation

Day 14 Bit Manipulation

Algorithm II

Day 1 Binary Search

0034Find First and Last Position of Element in Sorted ArrayMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)1715.87
0033Search in Rotated Sorted ArrayMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)6396.89
0074Search a 2D MatrixMediumTop_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)7690.98

Day 2 Binary Search

Day 3 Two Pointers

00153SumMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2)17375.85

Day 4 Two Pointers

0011Container With Most WaterMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Greedy, Two_Pointers, Big_O_Time_O(n)_Space_O(1)24811.15

Day 5 Sliding Window

0438Find All Anagrams in a StringMediumTop_100_Liked_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n+m)_Space_O(1)10397.89

Day 6 Breadth First Search Depth First Search

Day 7 Breadth First Search Depth First Search

Day 8 Breadth First Search Depth First Search

Day 9 Recursion Backtracking

0078SubsetsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Backtracking, Big_O_Time_O(2^n)_Space_O(n*2^n)10194.29

Day 10 Recursion Backtracking

0039Combination SumMediumTop_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(2^n)_Space_O(n+2^n)9499.60

Day 11 Recursion Backtracking

0017Letter Combinations of a Phone NumberMediumTop_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Backtracking, Big_O_Time_O(4^n)_Space_O(n)10895.24
0022Generate ParenthesesMediumTop_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Big_O_Time_O(2^n)_Space_O(n)8199.57
0079Word SearchMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Backtracking, Big_O_Time_O(4^(m*n))_Space_O(m*n)15299.69

Day 12 Dynamic Programming

0055Jump GameMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)18938.02

Day 13 Dynamic Programming

0045Jump Game IIMediumTop_100_Liked_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)14415.35
0062Unique PathsMediumTop_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Combinatorics, Big_O_Time_O(m*n)_Space_O(m*n)1693.42

Day 14 Dynamic Programming

0005Longest Palindromic SubstringMediumTop_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)6199.50

Day 15 Dynamic Programming

Day 16 Dynamic Programming

0300Longest Increasing SubsequenceMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n)8089.11

Day 17 Dynamic Programming

1143Longest Common SubsequenceMediumTop_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n*m)_Space_O(n*m)5990.45

Day 18 Dynamic Programming

0072Edit DistanceHardTop_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n2)5195.38
0322Coin ChangeMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Breadth_First_Search, Big_O_Time_O(m*n)_Space_O(amount)7890.63

Day 19 Bit Manipulation

Day 20 Others

Day 21 Others

Binary Search I

Day 1

Day 2

0035Search Insert PositionEasyTop_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)1066.17

Day 3

Day 4

Day 5

0034Find First and Last Position of Element in Sorted ArrayMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)1715.87

Day 6

Day 7

Day 8

0074Search a 2D MatrixMediumTop_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)7690.98

Day 9

Day 10

Day 11

0033Search in Rotated Sorted ArrayMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)6396.89

Day 12

Algorithms

#TitleDifficultyTagTime, msTime, %
1143Longest Common SubsequenceMediumTop_100_Liked_Questions, String, Dynamic_Programming, Algorithm_II_Day_17_Dynamic_Programming, Dynamic_Programming_I_Day_19, Udemy_Dynamic_Programming, Big_O_Time_O(n*m)_Space_O(n*m)5990.45
0763Partition LabelsMediumTop_100_Liked_Questions, String, Hash_Table, Greedy, Two_Pointers, Data_Structure_II_Day_7_String, Big_O_Time_O(n)_Space_O(1)8298.72
0739Daily TemperaturesMediumTop_100_Liked_Questions, Array, Stack, Monotonic_Stack, Programming_Skills_II_Day_6, Big_O_Time_O(n)_Space_O(n)37644.29
0647Palindromic SubstringsMediumTop_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n)4892.55
0560Subarray Sum Equals KMediumTop_100_Liked_Questions, Array, Hash_Table, Prefix_Sum, Data_Structure_II_Day_5_Array, Big_O_Time_O(n)_Space_O(n)13546.56
0543Diameter of Binary TreeEasyTop_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Level_2_Day_7_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(n)_Space_O(n)7484.67
0494Target SumMediumTop_100_Liked_Questions, Array, Dynamic_Programming, Backtracking, Big_O_Time_O(n*(sum+s))_Space_O(n*(sum+s))6299.32
0438Find All Anagrams in a StringMediumTop_100_Liked_Questions, String, Hash_Table, Sliding_Window, Algorithm_II_Day_5_Sliding_Window, Programming_Skills_II_Day_12, Level_1_Day_12_Sliding_Window/Two_Pointer, Big_O_Time_O(n+m)_Space_O(1)10397.89
0437Path Sum IIIMediumTop_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Level_2_Day_7_Tree, Big_O_Time_O(n)_Space_O(n)7697.16
0416Partition Equal Subset SumMediumTop_100_Liked_Questions, Array, Dynamic_Programming, Level_2_Day_13_Dynamic_Programming, Big_O_Time_O(n*sums)_Space_O(n*sums)9597.38
0394Decode StringMediumTop_100_Liked_Questions, String, Stack, Recursion, Level_1_Day_14_Stack, Udemy_Strings, Big_O_Time_O(n)_Space_O(n)4499.55
0347Top K Frequent ElementsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Sorting, Heap_Priority_Queue, Counting, Divide_and_Conquer, Quickselect, Bucket_Sort, Data_Structure_II_Day_20_Heap_Priority_Queue, Big_O_Time_O(n*log(n))_Space_O(k)12595.29
0338Counting BitsEasyTop_100_Liked_Questions, Dynamic_Programming, Bit_Manipulation, Udemy_Bit_Manipulation, Big_O_Time_O(num)_Space_O(num)6798.82
0322Coin ChangeMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Breadth_First_Search, Algorithm_II_Day_18_Dynamic_Programming, Dynamic_Programming_I_Day_20, Level_2_Day_12_Dynamic_Programming, Big_O_Time_O(m*n)_Space_O(amount)7890.63
0300Longest Increasing SubsequenceMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Binary_Search, Algorithm_II_Day_16_Dynamic_Programming, Binary_Search_II_Day_3, Dynamic_Programming_I_Day_18, Udemy_Dynamic_Programming, Big_O_Time_O(n*log_n)_Space_O(n)8089.11
0295Find Median from Data StreamHardTop_100_Liked_Questions, Top_Interview_Questions, Sorting, Two_Pointers, Design, Heap_Priority_Queue, Data_Stream, Big_O_Time_O(n*log_n)_Space_O(n)64221.62
0287Find the Duplicate NumberMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Two_Pointers, Bit_Manipulation, Binary_Search_II_Day_5, Big_O_Time_O(n)_Space_O(n)25730.11
0283Move ZeroesEasyTop_100_Liked_Questions, Top_Interview_Questions, Array, Two_Pointers, Algorithm_I_Day_3_Two_Pointers, Programming_Skills_I_Day_6_Array, Udemy_Arrays, Big_O_Time_O(n)_Space_O(1)13396.30
0240Search a 2D Matrix IIMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Matrix, Divide_and_Conquer, Data_Structure_II_Day_4_Array, Binary_Search_II_Day_8, Big_O_Time_O(n+m)_Space_O(1)14260.76
0239Sliding Window MaximumHardTop_100_Liked_Questions, Top_Interview_Questions, Array, Heap_Priority_Queue, Sliding_Window, Queue, Monotonic_Queue, Udemy_Arrays, Big_O_Time_O(n*k)_Space_O(n+k)49346.05
0101Symmetric TreeEasyTop_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_11_Tree, Level_2_Day_15_Tree, Big_O_Time_O(N)_Space_O(log(N))6497.79
0098Validate Binary Search TreeMediumTop_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Data_Structure_I_Day_14_Tree, Level_1_Day_8_Binary_Search_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(N)_Space_O(log(N))7597.31
0096Unique Binary Search TreesMediumTop_100_Liked_Questions, Dynamic_Programming, Math, Tree, Binary_Tree, Binary_Search_Tree, Dynamic_Programming_I_Day_11, Big_O_Time_O(n)_Space_O(1)1398.48
0094Binary Tree Inorder TraversalEasyTop_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Data_Structure_I_Day_10_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(n)_Space_O(n)9099.30
0084Largest Rectangle in HistogramHardTop_100_Liked_Questions, Top_Interview_Questions, Array, Stack, Monotonic_Stack, Big_O_Time_O(n_log_n)_Space_O(log_n)30430.92
0079Word SearchMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Backtracking, Algorithm_II_Day_11_Recursion_Backtracking, Big_O_Time_O(4^(m*n))_Space_O(m*n)15299.69
0078SubsetsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Backtracking, Algorithm_II_Day_9_Recursion_Backtracking, Udemy_Backtracking/Recursion, Big_O_Time_O(2^n)_Space_O(n*2^n)10194.29
0076Minimum Window SubstringHardTop_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Level_2_Day_14_Sliding_Window/Two_Pointer, Big_O_Time_O(s.length())_Space_O(1)5698.72
0075Sort ColorsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Data_Structure_II_Day_2_Array, Udemy_Arrays, Big_O_Time_O(n)_Space_O(1)9893.59
0074Search a 2D MatrixMediumTop_100_Liked_Questions, Array, Binary_Search, Matrix, Data_Structure_I_Day_5_Array, Algorithm_II_Day_1_Binary_Search, Binary_Search_I_Day_8, Level_2_Day_8_Binary_Search, Udemy_2D_Arrays/Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)7690.98
0073Set Matrix ZeroesMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Matrix, Udemy_2D_Arrays/Matrix, Big_O_Time_O(m*n)_Space_O(1)12496.92
0072Edit DistanceHardTop_100_Liked_Questions, String, Dynamic_Programming, Algorithm_II_Day_18_Dynamic_Programming, Dynamic_Programming_I_Day_19, Udemy_Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n2)5195.38
0070Climbing StairsEasyTop_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Algorithm_I_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_2, Level_1_Day_10_Dynamic_Programming, Udemy_Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)1594.90
0064Minimum Path SumMediumTop_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Dynamic_Programming_I_Day_16, Udemy_Dynamic_Programming, Big_O_Time_O(m*n)_Space_O(m*n)7494.37
0062Unique PathsMediumTop_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Combinatorics, Algorithm_II_Day_13_Dynamic_Programming, Dynamic_Programming_I_Day_15, Level_1_Day_11_Dynamic_Programming, Big_O_Time_O(m*n)_Space_O(m*n)1693.42
0056Merge IntervalsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Data_Structure_II_Day_2_Array, Level_2_Day_17_Interval, Udemy_2D_Arrays/Matrix, Big_O_Time_O(n_log_n)_Space_O(n)14989.48
0055Jump GameMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Algorithm_II_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_4, Udemy_Arrays, Big_O_Time_O(n)_Space_O(1)18938.02
0053Maximum SubarrayEasyTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Data_Structure_I_Day_1_Array, Dynamic_Programming_I_Day_5, Udemy_Famous_Algorithm, Big_O_Time_O(n)_Space_O(1)27620.05
0051N-QueensHardTop_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(N!)_Space_O(N)10696.34
0049Group AnagramsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Data_Structure_II_Day_8_String, Programming_Skills_II_Day_11, Udemy_Strings, Big_O_Time_O(n*k_log_k)_Space_O(n)14596.20
0048Rotate ImageMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Data_Structure_II_Day_3_Array, Programming_Skills_II_Day_7, Udemy_2D_Arrays/Matrix, Big_O_Time_O(n^2)_Space_O(1)9297.78
0046PermutationsMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Algorithm_I_Day_11_Recursion_Backtracking, Level_2_Day_20_Brute_Force/Backtracking, Udemy_Backtracking/Recursion, Big_O_Time_O(n*n!)_Space_O(n+n!)1485.56
0045Jump Game IIMediumTop_100_Liked_Questions, Array, Dynamic_Programming, Greedy, Algorithm_II_Day_13_Dynamic_Programming, Dynamic_Programming_I_Day_4, Big_O_Time_O(n)_Space_O(1)14415.35
0042Trapping Rain WaterHardTop_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Two_Pointers, Stack, Monotonic_Stack, Dynamic_Programming_I_Day_9, Udemy_Two_Pointers, Big_O_Time_O(n)_Space_O(1)8189.96
0041First Missing PositiveHardTop_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Udemy_Arrays, Big_O_Time_O(n)_Space_O(n)19213.98
0039Combination SumMediumTop_100_Liked_Questions, Array, Backtracking, Algorithm_II_Day_10_Recursion_Backtracking, Level_2_Day_20_Brute_Force/Backtracking, Udemy_Backtracking/Recursion, Big_O_Time_O(2^n)_Space_O(n+2^n)9499.60
0035Search Insert PositionEasyTop_100_Liked_Questions, Array, Binary_Search, Algorithm_I_Day_1_Binary_Search, Binary_Search_I_Day_2, Big_O_Time_O(log_n)_Space_O(1)1066.17
0034Find First and Last Position of Element in Sorted ArrayMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Algorithm_II_Day_1_Binary_Search, Binary_Search_I_Day_5, Big_O_Time_O(log_n)_Space_O(1)1715.87
0033Search in Rotated Sorted ArrayMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Algorithm_II_Day_1_Binary_Search, Binary_Search_I_Day_11, Level_2_Day_8_Binary_Search, Udemy_Binary_Search, Big_O_Time_O(log_n)_Space_O(1)6396.89
0032Longest Valid ParenthesesHardTop_100_Liked_Questions, String, Dynamic_Programming, Stack, Big_O_Time_O(n)_Space_O(1)4996.18
0031Next PermutationMediumTop_100_Liked_Questions, Array, Two_Pointers, Big_O_Time_O(n)_Space_O(1)2025.19
0025Reverse Nodes in k-GroupHardTop_100_Liked_Questions, Linked_List, Recursion, Data_Structure_II_Day_13_Linked_List, Udemy_Linked_List, Big_O_Time_O(n)_Space_O(k)7586.97
0024Swap Nodes in PairsMediumTop_100_Liked_Questions, Linked_List, Recursion, Data_Structure_II_Day_12_Linked_List, Udemy_Linked_List, Big_O_Time_O(n)_Space_O(1)5898.51
0023Merge k Sorted ListsHardTop_100_Liked_Questions, Top_Interview_Questions, Heap_Priority_Queue, Linked_List, Divide_and_Conquer, Merge_Sort, Big_O_Time_O(k*n*log(k))_Space_O(log(k))7898.24
0022Generate ParenthesesMediumTop_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Algorithm_II_Day_11_Recursion_Backtracking, Udemy_Backtracking/Recursion, Big_O_Time_O(2^n)_Space_O(n)8199.57
0021Merge Two Sorted ListsEasyTop_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Data_Structure_I_Day_7_Linked_List, Algorithm_I_Day_10_Recursion_Backtracking, Level_1_Day_3_Linked_List, Udemy_Linked_List, Big_O_Time_O(m+n)_Space_O(m+n)6992.74
0020Valid ParenthesesEasyTop_100_Liked_Questions, Top_Interview_Questions, String, Stack, Data_Structure_I_Day_9_Stack_Queue, Udemy_Strings, Big_O_Time_O(n)_Space_O(n)5396.68
0019Remove Nth Node From End of ListMediumTop_100_Liked_Questions, Top_Interview_Questions, Two_Pointers, Linked_List, Algorithm_I_Day_5_Two_Pointers, Level_2_Day_3_Linked_List, Big_O_Time_O(L)_Space_O(L)6990.79
0017Letter Combinations of a Phone NumberMediumTop_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Backtracking, Algorithm_II_Day_11_Recursion_Backtracking, Udemy_Backtracking/Recursion, Big_O_Time_O(4^n)_Space_O(n)10895.24
00153SumMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Data_Structure_II_Day_1_Array, Algorithm_II_Day_3_Two_Pointers, Udemy_Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2)17375.85
0011Container With Most WaterMediumTop_100_Liked_Questions, Top_Interview_Questions, Array, Greedy, Two_Pointers, Algorithm_II_Day_4_Two_Pointers, Big_O_Time_O(n)_Space_O(1)24811.15
0010Regular Expression MatchingHardTop_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Recursion, Udemy_Dynamic_Programming, Big_O_Time_O(m*n)_Space_O(m*n)5996.10
0009Palindrome NumberEasyMath, Udemy_Integers4234.61
0008String to Integer (atoi)MediumTop_Interview_Questions, String4399.83
0007Reverse IntegerMediumTop_Interview_Questions, Math, Udemy_Integers2359.02
0006Zigzag ConversionMediumString5999.87
0005Longest Palindromic SubstringMediumTop_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Data_Structure_II_Day_9_String, Algorithm_II_Day_14_Dynamic_Programming, Dynamic_Programming_I_Day_17, Udemy_Strings, Big_O_Time_O(n)_Space_O(n)6199.50
0004Median of Two Sorted ArraysHardTop_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Divide_and_Conquer, Big_O_Time_O(log(min(N,M)))_Space_O(1)8396.35
0003Longest Substring Without Repeating CharactersMediumTop_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Algorithm_I_Day_6_Sliding_Window, Level_2_Day_14_Sliding_Window/Two_Pointer, Udemy_Strings, Big_O_Time_O(n)_Space_O(1)5098.40
0002Add Two NumbersMediumTop_100_Liked_Questions, Top_Interview_Questions, Math, Linked_List, Recursion, Data_Structure_II_Day_10_Linked_List, Programming_Skills_II_Day_15, Big_O_Time_O(max(N,M))_Space_O(max(N,M))8477.30
0001Two SumEasyTop_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Data_Structure_I_Day_2_Array, Level_1_Day_13_Hashmap, Udemy_Arrays, Big_O_Time_O(n)_Space_O(n)13481.26

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