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leetcode resources

leetcode resources

May 27, 20251 min read

As you code feel free to listen to radio by freeCodeCamp - CodeRadio

255 items under this folder.

Dec 01, 2025
1539 Kth Missing Positive Number
- easy
Jul 20, 2025
1980 Find Unique Binary Strings
- medium
May 27, 2025
463 Island Perimeter
- medium
May 27, 2025
49 Group Anagrams
- medium
May 27, 2025
5 Longest Palindromic Substring
- medium
May 27, 2025
50 Pow(x, n)
- medium
May 27, 2025
509 Fibonacci Number (pending) (2)
- medium
May 27, 2025
53 Maximum Subarray
- medium
May 27, 2025
542 01 Matrix
- medium
May 27, 2025
55 Jump Game
- medium
May 27, 2025
567 Permutation in String
- medium
- sliding-window
May 27, 2025
623 Add One Row to Tree
- medium
May 27, 2025
647 Palindromic Substrings
- medium
May 27, 2025
648 Replace Words
- medium
May 27, 2025
680 Valid Palindrome II
- medium
May 27, 2025
703 Kth Largest Element in a Stream
- medium
May 27, 2025
713 Subarray Product Less Than K
- medium
May 27, 2025
739 Daily Temperatures
- medium
May 27, 2025
746 Min Cost Climbing Stairs
- medium
May 27, 2025
78 Subsets
- medium
May 27, 2025
83 Remove Duplicates from Sorted List
- medium
May 27, 2025
846 Hand of Straights
- medium
May 27, 2025
876 Middle of the Linked List
- medium
May 27, 2025
896 Monotonic Array
- medium
May 27, 2025
921 Minimum Add to Make Parentheses Valid
- medium
May 27, 2025
988 Smallest String Starting From Leaf
- medium
May 27, 2025
994 Rotting Oranges
- medium
May 27, 2025
Leetcode w me
- medium
May 27, 2025
213 House Robber II
- medium
May 27, 2025
215 Kth Largest Element in an Array
- medium
May 27, 2025
2265 Count Nodes Equal to Average of Subtree
- medium
May 27, 2025
2287 Rearrange Characters to Make Target String
- medium
May 27, 2025
2315 Count Asterisks
- medium
May 27, 2025
235 Lowest Common Ancestor of a Binary Search Tree
- medium
May 27, 2025
2373 Largest Local Values in a Matrix
- medium
May 27, 2025
238 Product of Array Except Self
- medium
May 27, 2025
2391 Minimum Amount of Time to Collect Garbage
- medium
May 27, 2025
2428 Maximum Sum of an Hourglass
- medium
May 27, 2025
2433 Find The Original Array of Prefix Xor
- medium
May 27, 2025
2448 Minimum Cost to Make Array Equal (debug pendi
- medium
May 27, 2025
2610 Convert an Array Into a 2D Array With Conditions
- medium
May 27, 2025
2710 Remove Trailing Zeros From a String
- medium
May 27, 2025
2744 Find Maximum Number of String Pairs
- medium
May 27, 2025
2785 Sort Vowels in a String
- medium
May 27, 2025
2788 Split Strings by Separator
- medium
May 27, 2025
2798 Number of Employees Who Met the Target
- easy
May 27, 2025
2828 Check if a String Is an Acronym of Words
- medium
May 27, 2025
2849 Determine if a Cell Is Reachable at a Given T
- medium
May 27, 2025
2913 Subarrays Distinct Element Sum of Squares I
- medium
May 27, 2025
2958 Length of Longest Subarray With at Most K Fre
- medium
May 27, 2025
3 Longest Substring Without Repeating Characters
- medium
May 27, 2025
3075 Maximize Happiness of Selected Children
- medium
May 27, 2025
3079 Find the Sum of Encrypted Integers
- medium
May 27, 2025
310 Minimum Height Trees
- medium
May 27, 2025
322 Coin change
- medium
May 27, 2025
33 Search in Rotated Sorted Array
- medium
May 27, 2025
347 Top K Frequent Elements
- medium
May 27, 2025
383 Ransom Note
- medium
May 27, 2025
387 First Unique Character in a String
- medium
May 27, 2025
402 Remove K Digits
- medium
May 27, 2025
404 Sum of Left Leaves
- medium
May 27, 2025
409 Longest Palindrome
- medium
May 27, 2025
42 Trapping Rain Water
- medium
May 27, 2025
424 Longest Repeating Character Replacement
- medium
May 27, 2025
442 Find All Duplicates in an Array
- medium
May 27, 2025
451 Sort Characters By Frequency
- medium
May 27, 2025
46 Permutations
- medium
May 27, 2025
1442 Count Triplets That Can Form Two Arrays of Eq
- medium
May 27, 2025
1493 Longest Subarray of 1's After Deleting One El
- medium
May 27, 2025
1496 Path Crossing
- medium
May 27, 2025
15 3Sum
- medium
May 27, 2025
152 Maximum Product Subarray
- medium
May 27, 2025
153 Find Minimum in Rotated Sorted Array
- medium
May 27, 2025
1535 Find the Winner of an Array Game
- medium
May 27, 2025
1544 Make The String Great
- medium
May 27, 2025
1547 Minimum Cost to Cut a Stick (yet to solve)
- medium
May 27, 2025
1551 Minimum Operations to Make Array Equal
- medium
May 27, 2025
1561 Maximum Number of Coins You Can Get
- medium
May 27, 2025
1572 Matrix Diagonal Sum
- medium
May 27, 2025
1575 Count All Possible Routes (yet to solve)
- medium
May 27, 2025
1614 Maximum Nesting Depth of the Parentheses
- medium
May 27, 2025
165 Compare Version Numbers
- medium
May 27, 2025
167 Two Sum II - Input Array Is Sorted
- medium
May 27, 2025
1689 Partitioning Into Minimum Number Of Deci-Bina
- medium
May 27, 2025
1732 Find the Highest Altitude (pending)
- medium
May 27, 2025
1903 Largest Odd Number in String
- medium
May 27, 2025
1967 Number of Strings That Appear as Substrings i
- medium
May 27, 2025
198 House Robber
- medium
May 27, 2025
1992 Find All Groups of Farmland
- medium
May 27, 2025
200 Number of Islands
- medium
May 27, 2025
206 Reverse Linked List
- medium
May 27, 2025
207 Course Schedule
- medium
- graph
May 27, 2025
2090 K Radius Subarray Averages
- medium
May 27, 2025
21 Merge Two Sorted Lists
- medium
May 27, 2025
1 Two Sum (pending)
- medium
May 27, 2025
102 Binary Tree Level Order Traversal
- medium
May 27, 2025
1027 Longest Arithmetic Subsequence (Pending)
- medium
May 27, 2025
1046 Last Stone Weight
- medium
May 27, 2025
105 Construct Binary Tree from Preorder and Inorde
- medium
May 27, 2025
11 Container With Most Water (pending)
- medium
May 27, 2025
110 Balanced Binary Tree
- medium
May 27, 2025
1122 Relative Sort Array
- easy
May 27, 2025
1137 N-th Tribonacci Number (pending) (1)
- medium
May 27, 2025
1143 Longest Common Subsequence (Pending)
- medium
May 27, 2025
1143 Longest Common Subsequence
- medium
May 27, 2025
1208 Get Equal Substrings Within Budget
- medium
May 27, 2025
121 Best Time to Buy and Sell Stock
- medium
May 27, 2025
1221 Split a String in Balanced Strings
- medium
May 27, 2025
128 Longest Consecutive Sequence
- medium
May 27, 2025
1282 Group The People Given The Group Size They Belong To
- medium
May 27, 2025
129 Sum Root to Leaf Numbers
- medium
May 27, 2025
133 Clone Graph
- medium
May 27, 2025
1347 Minimum Number of Steps to Make Two Strings A
- medium
May 27, 2025
138 Copy List with Random Pointer
- medium
May 27, 2025
143 Reorder List
- medium
May 27, 2025
144 Binary Tree Preorder Traversal
- medium
May 27, 2025
2396 Strictly Palindromic Number
- medium
May 26, 2025
2101 Detonate the Maximum Bombs
- medium
May 07, 2025
991 Broken Calculator
- medium
Apr 06, 2025
438 Find All Anagrams in a String
- medium
Apr 03, 2025
278 First Bad Version
- medium
Apr 03, 2025
344 Reverse String
- easy
Apr 03, 2025
997 Find the Town Judge
- easy
Mar 31, 2025
3000 Maximum Area of Longest Diagonal Rectangle
- easy
Mar 26, 2025
3131 Find the Integer Added to Array I
- easy
Mar 26, 2025
735 Asteroid Collision
- medium
Mar 20, 2025
2342 Max Sum of a Pair With Equal Sum of Digits
- medium
Mar 20, 2025
2661 First Completely Painted Row or Column
- medium
Mar 19, 2025
2401 Longest Nice Subarray
- medium
Mar 19, 2025
2563 Count the Number of Fair Pairs
- medium
Mar 17, 2025
957 Prison Cells After N Days
- medium
Mar 15, 2025
2461 Maximum Sum of Distinct Subarrays With Length K
- medium
Mar 15, 2025
904 Fruit Into Baskets
- medium
Mar 13, 2025
74 Search a 2D Matrix
- medium
Mar 12, 2025
3014 Minimum Number of Pushes to Type Word I
- medium
Mar 08, 2025
64 Minimum Path Sum
- medium
- dynamic-programming
Mar 03, 2025
2149 Rearrange Array Elements by Sign
- medium
Mar 03, 2025
2161 Partition Array According to Given Pivot
- medium
Mar 03, 2025
86 Partition List
- medium
Feb 22, 2025
2294 Partition Array Such That Maximum Difference Is K
- medium
Feb 22, 2025
2779 Maximum Beauty of an Array After Applying Operation
- medium
Feb 21, 2025
598 Range Addition II
- easy
Feb 20, 2025
26 Remove Duplicates from Sorted Array
- easy
Feb 17, 2025
1079 Letter Tile Possibilities
- medium
Feb 17, 2025
2406 Divide Intervals Into Minimum Number of Groups
- medium
Feb 16, 2025
1423 Maximum Points You Can Obtain from Cards
- medium
Feb 16, 2025
1509 Minimum Difference Between Largest and Smallest Value in Three Moves
- medium
Feb 16, 2025
56 Merge Intervals
- medium
Feb 14, 2025
1007 Minimum Domino Rotations For Equal Row
- medium
Feb 14, 2025
3066 Minimum Operations to Exceed Threshold Value II
- medium
Feb 13, 2025
2208 Minimum Operations to Halve Array Sum
- medium
Feb 12, 2025
2364 Count Number of Bad Pairs
- medium
Feb 10, 2025
1910 Remove All Occurrences of a Substring
- medium
Feb 07, 2025
3174 Clear Digits
- medium
Feb 05, 2025
1790 Check if One String Swap Can Make String Equal
- easy
Jan 30, 2025
684 Redundant Connection
- medium
Jan 29, 2025
1268 Search Suggestions System
- medium
Jan 26, 2025
2824 Count Pairs Whose Sum is Less than Target
- medium
Jan 25, 2025
2611 Mice and Cheese
- medium
Jan 20, 2025
1207 Unique Number of Occurences
- easy
Jan 20, 2025
1249 Minimum Remove to Make Valid Parentheses
- medium
Nov 28, 2024
349 Intersection of Two Arrays
- easy
Oct 03, 2024
1035 Uncrossed Lines
- medium
- dp
Sep 17, 2024
884 Uncommon Words from Two Sentences
- easy
Sep 14, 2024
494 Target Sum
- medium
- dp
Sep 12, 2024
1310 XOR Queries of a Subarray
- medium
- xor
Sep 11, 2024
1367 Linked List in Binary Tree
Sep 11, 2024
54 Spiral Matrix
- medium
- matrix
Sep 11, 2024
62 Unique Paths
- medium
- dynamic-programming
Sep 11, 2024
63 Unique Paths II
- medium
- dynamic-programming
Sep 11, 2024
725 Split Linked List in Parts
- medium
- linked-list
Aug 30, 2024
2807 Insert Greatest Common Divisors in Linked List
- medium
- linked-list
Aug 30, 2024
3217 Delete Nodes From Linked List Present in Array
- medium
- linked-list
Aug 30, 2024
445 Add Two Numbers II
- medium
- linked-list
Aug 29, 2024
160 Intersection of Two Linked Lists
- medium
- linked-list
Aug 29, 2024
1669 Merge In Between Linked Lists
- medium
- linked-list
Aug 29, 2024
599 Minimum Index Sum of Two Lists
- medium
- hashmap
Aug 28, 2024
1290 Convert Binary Number in a Linked List to Integer
- easy
Aug 28, 2024
1905 Count Sub Islands
- medium
- dfs
Aug 28, 2024
23 Merge k Sorted Lists
- hard
- linked-lists
Aug 24, 2024
1466 Reorder Routes to Make All Paths Lead to the City Zero
- medium
- graph
Aug 24, 2024
2415 Reverse Odd Levels of Binary Tree
- medium
- binary-tree
Aug 23, 2024
1305 All Elements in Two Binary Search Trees
Aug 23, 2024
1315 Sum of Nodes with Even-Valued Grandparent
- medium
- binary-tree
Aug 23, 2024
797 All Paths From Source to Target
Aug 23, 2024
897 Increasing Order Search Tree
- medium
- bst
Aug 22, 2024
2368 Reachable Nodes With Restrictions
- medium
- graph
Aug 22, 2024
476 Number Complement
- easy
- recursion
Aug 19, 2024
1283 Find the Smallest Divisor Given a Threshold
- medium
- binary-search
Aug 19, 2024
226 Invert Binary Tree
- medium
- binary-tree
Aug 19, 2024
230 Kth Smallest Element in a BST
- medium
- bst
Aug 17, 2024
1768 Merge Strings Alternatively
- easy
Aug 17, 2024
199 Binary Tree Right Side View
- medium
- binary-tree
Aug 10, 2024
209 Minimum Size Subarray Sum
- medium
- sliding-window
Aug 09, 2024
1011 Capacity To Ship Packages Within D Days
- medium
Aug 09, 2024
1482 Minimum Number of Days to Make m Bouquets
- medium
- binary-search
Aug 09, 2024
1508 Range Sum of Sorted Subarray Sums
- medium
Aug 09, 2024
1974 Minimum Time to Type Word Using Special Typewriter
- easy
Aug 09, 2024
2053 Kth Distinct String in an Array
- medium
Aug 09, 2024
3016 Minimum Number of Pushes to Type Word II
- medium
Aug 09, 2024
840 Magic Squares In Grid
- medium
Aug 09, 2024
875 Koko Eating Bananas
- medium
Aug 05, 2024
1662 Check If Two String Arrays are Equivalent
- easy
- string
Aug 05, 2024
1773 Count Items Matching A Rule
- easy
Aug 05, 2024
1816 Truncate Sentence
- easy
- string
Aug 05, 2024
1832 Check if the Sentence Is Pangram
- easy
- set
Aug 05, 2024
1844 Replace All Digits with Characters
- easy
Aug 05, 2024
1859 Sorting the Sentence
- easy
- sort
Aug 05, 2024
2325 Decode the Message
- easy
- hashmaps
Aug 05, 2024
2697 Lexicographically Smallest Palindrome
- easy
Aug 05, 2024
2810 Faulty Keyboard
- easy
Aug 05, 2024
3019 Number of Changing Keys
- easy
Aug 05, 2024
804 Unique Morse Code Words
- easy
Aug 01, 2024
1498 Number of Sequences That Satisfy the Given Sum Condition
- medium
- two-pointers
Aug 01, 2024
1653 Minimum Deletions to Make String Balanced
- medium
Aug 01, 2024
2124 Check if All A's Appears Before All B's
- easy
Aug 01, 2024
2194 Cells in a Range on an Excel Sheet
- easy
Aug 01, 2024
2124 Check if All A's Appears Before All B's
- easy
Jul 30, 2024
3211 Generate Binary Strings Without Adjacent Zeros
Jul 27, 2024
70 Climbing Stairs
- easy
- dp
Jul 25, 2024
912 Sort An Array
- medium
- sorting
Jul 23, 2024
1636 Sort Array by Increasing Frequency
- easy
Jul 23, 2024
617 Merge Two Binary Trees
- easy
- binary-tree
Jul 23, 2024
700 Search in a Binary Search Tree
- easy
- binary-search-tree
Jul 22, 2024
112 Path Sum
- easy
- binary-tree
Jul 22, 2024
1379 Find a Corresponding Node of a Binary Tree in a Clone of That Tree
- easy
- binary-tree
Jul 22, 2024
2148 Sort the People
- easy
- arrays
Jul 21, 2024
1380 Lucky Numbers in a Matrix
- easy
- matrix
Jul 21, 2024
1557 Minimum Number of Vertices to Reach All Nodes
Jul 21, 2024
2192 All Ancestors of a Node in a Directed Acyclic Graph
Jul 15, 2024
2196 Create Binary Tree From Descriptions
Jul 10, 2024
1598 Crawler Log Folder
- easy
Jul 08, 2024
1823 Find the Winner of the Circular Game
- medium
- simulation
Jul 07, 2024
1518 Water Bottles
- easy
Jul 06, 2024
1038 Binary Search Tree to Greater Sum Tree
- medium
- binary-search-tree
Jul 06, 2024
2582 Pass the Pillwo
- easy
- simulation
Jul 06, 2024
538 Convert BST to Greater Tree
- medium
- binary-search-tree
Jul 02, 2024
350 Intersection of Two Arrays II
- easy
Jun 26, 2024
108 Convert Sorted Array to Binary Search Tree
Jun 26, 2024
1382 Balance a Binary Search Tree
Jun 26, 2024
1791 Find Center of Star Graph
- easy
- graph
Jun 25, 2024
300 Longest Increasing Subsequence
Jun 24, 2024
646 Maximum Length of Pair Chain
Jun 23, 2024
518 Coin Change II
- medium
- dynamic-programming
Jun 23, 2024
877 Stone Game
Jun 23, 2024
983 Minimum Cost For Tickets
Jun 19, 2024
69 Sqrt(x)
- medium
Jun 18, 2024
826 Most Profit Assigning Work
Jun 17, 2024
633 Sum of Square Numbers
- medium
Jun 14, 2024
945 Minimum Increment to Make Array Unique
- medium
Jun 13, 2024
139 Word Break
- medium
- dynamic-programming
Jun 12, 2024
2037 Minimum Number of Moves to Seat Everyone
Jun 12, 2024
75 Sort Colors
- medium
- dutch-national-flag
Jun 07, 2024
523 Continuous Subarray Sum
- medium
May 14, 2024
441 Arranging Coins
- easy

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