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49 items with this tag.
Feb 24, 2026
12. Integer to Roman
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leetcode
strings
medium
Feb 24, 2026
1493. Longest Subarray of 1's After Deleting One Element
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leetcode
sliding-window
medium
Feb 24, 2026
209. Minimum Size Subarray Sum
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leetcode
sliding-window
medium
Feb 24, 2026
235. Lowest Common Ancestor of a Binary Search Tree
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leetcode
trees
medium
Feb 24, 2026
3. Longest Substring Without Repeating Characters
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leetcode
sliding-window
medium
Feb 24, 2026
36. Valid Sudoku
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leetcode
hash-map
medium
Feb 24, 2026
443. String Compression
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leetcode
two-pointers
medium
Feb 24, 2026
46. Permutations
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leetcode
backtracking
medium
Feb 24, 2026
5. Longest Palindromic Substring
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leetcode
strings
medium
Feb 24, 2026
567. Permutation in String
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leetcode
sliding-window
medium
Feb 24, 2026
658. Find K Closest Elements
interview
leetcode
binary-search
medium
Feb 24, 2026
739. Daily Temperatures
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leetcode
stack-queue
medium
Feb 17, 2026
102. Binary Tree Level Order Traversal
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leetcode
trees
medium
Feb 17, 2026
1382. Balance a Binary Search Tree
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leetcode
trees
medium
Feb 17, 2026
236. Lowest Common Ancestor of a Binary Tree
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leetcode
trees
medium
Feb 17, 2026
450. Delete Node in a BST
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leetcode
trees
medium
Feb 17, 2026
54. Spiral Matrix
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leetcode
matrix
medium
Feb 17, 2026
701. Insert into a Binary Search Tree
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leetcode
trees
medium
Feb 16, 2026
150. Evaluate Reverse Polish Notation
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leetcode
stack-queue
medium
Feb 16, 2026
322. Coin Change
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leetcode
dynamic-programming
medium
Feb 16, 2026
53. Maximum Subarray
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leetcode
dynamic-programming
medium
Feb 16, 2026
784. Letter Case Permutation
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leetcode
backtracking
medium
Feb 16, 2026
81. Search in Rotated Sorted Array II
interview
leetcode
binary-search
medium
Feb 15, 2026
113. Path Sum II
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leetcode
trees
medium
Feb 15, 2026
155. Min Stack
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leetcode
stack-queue
medium
Feb 15, 2026
22. Generate Parentheses
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leetcode
backtracking
medium
Feb 15, 2026
309. Best Time to Buy and Sell Stock with Cooldown
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leetcode
dynamic-programming
medium
Feb 15, 2026
347. Top K Frequent Elements
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leetcode
hash-map
medium
Feb 15, 2026
39. Combination Sum
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leetcode
backtracking
medium
Feb 15, 2026
438. Find All Anagrams in a String
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leetcode
sliding-window
medium
Feb 15, 2026
49. Group Anagrams
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leetcode
hash-map
medium
Feb 15, 2026
695. Max Area of Island
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leetcode
graph
medium
Feb 15, 2026
714. Best Time to Buy and Sell Stock with Transaction Fee
interview
leetcode
dynamic-programming
medium
Feb 15, 2026
78. Subsets
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leetcode
backtracking
medium
Feb 15, 2026
79. Word Search
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leetcode
backtracking
medium
Feb 15, 2026
98. Validate Binary Search Tree
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leetcode
trees
medium
Feb 12, 2026
11. Container With Most Water
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leetcode
two-pointers
medium
Feb 12, 2026
122. Best Time to Buy and Sell Stock II
interview
leetcode
dynamic-programming
medium
Feb 12, 2026
153. Find Minimum in Rotated Sorted Array
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leetcode
binary-search
medium
Feb 12, 2026
16. 3Sum
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leetcode
two-pointers
medium
Feb 12, 2026
18. 4Sum
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leetcode
two-pointers
medium
Feb 12, 2026
2. Add Two Numbers
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leetcode
linked-list
medium
Feb 12, 2026
200. Number of Islands
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leetcode
graph
medium
Feb 12, 2026
33. Search in Rotated Sorted Array
interview
leetcode
binary-search
medium
Feb 12, 2026
424. Longest Repeating Character Replacement
interview
leetcode
sliding-window
medium
Feb 12, 2026
56. Merge Intervals
interview
leetcode
greedy
medium
Feb 12, 2026
692. Top K Frequent Words
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leetcode
hash-map
medium
Feb 12, 2026
74. Search a 2D Matrix
interview
leetcode
binary-search
medium
Feb 12, 2026
763. Partition Labels
interview
leetcode
two-pointers
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