Coding Patterns

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21 Coding Patterns to Master Tech Interviews 🔥
Coding patterns improve our:
"ability to connect a new problem to an existing one"

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SolvedProblemDifficultyVideo SolutionCode
Minimum Size Subarray Sum
medium
Permutation in String
medium
Longest Substring Without Repeating Characters
medium
Fruit Into Baskets
medium
Minimum Window Substring
hard
Sliding Window Maximum
hard
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SolvedProblemDifficultyVideo SolutionCode
Happy Number
easy
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Linked List Cycle
easy
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Middle of the Linked List
easy
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Palindrome Linked List
easy
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Circular Array Loop
medium
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Add Two Numbers
medium
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Remove Nth Node From End of List
medium
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Reorder List
medium
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SolvedProblemDifficultyVideo SolutionCode
Meeting Rooms
easy
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Meeting Rooms II
medium
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Merge Intervals
medium
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Interval List Intersections
medium
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Non-overlapping Intervals
medium
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Insert Interval
medium
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SolvedProblemDifficultyVideo SolutionCode
Product of Array Except Self
medium
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Set Matrix Zeroes
medium
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Spiral Matrix
medium
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Rotate Image
medium
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Maximum Subarray Sum
medium
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Jump Game
medium
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Jump Game II
medium
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Gas Station
medium
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SolvedProblemDifficultyVideo SolutionCode
Missing Number
easy
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Set Mismatch
easy
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Contains Duplicate
easy
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Find All Duplicates in an Array
medium
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Find All Numbers Disappeared in an Array
medium
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First Missing Positive
hard
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SolvedProblemDifficultyVideo SolutionCode
Binary Search
easy
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Find Minimum in Rotated Sorted Array
medium
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Find Peak Element
medium
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Search in Rotated Sorted Array
medium
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Search a 2D Matrix
medium
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Search a 2D Matrix II
medium
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Find K Closest Elements
medium
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Median of Two Sorted Arrays
hard
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SolvedProblemDifficultyVideo SolutionCode
Reverse Linked List
easy
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Reverse Linked List II
medium
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Reverse Nodes in k-Group
hard
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SolvedProblemDifficultyVideo SolutionCode
Subsets
medium
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Subsets II
medium
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Permutations
medium
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Combination Sum
medium
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Combination Sum II
medium
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Generate Parentheses
medium
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Letter Combinations of a Phone Number
medium
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Sudoku Solver
hard
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N-Queens Problem
hard
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SolvedProblemDifficultyVideo SolutionCode
Average of Levels
easy
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Binary Tree Level Order Traversal
medium
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Binary Tree Zigzag Level Order Traversal
medium
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Binary Tree Level Order Traversal II
medium
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Minimum Depth of Binary Tree
medium
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Rotting Oranges
medium
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Populating Next Right Pointers in Each Node
medium
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Binary Tree Right Side View
medium
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All Nodes Distance K in Binary Tree
medium
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Minimum Knight Moves
hard
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SolvedProblemDifficultyVideo SolutionCode
Path Sum
easy
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Balanced Binary Tree
easy
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Maximum Depth of Binary Tree
easy
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Invert Binary Tree
easy
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Path Sum II
medium
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Path Sum III
medium
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Number of Islands
medium
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Kth Smallest Element in a BST
medium
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Lowest Common Ancestor of a Binary Search Tree
medium
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Lowest Common Ancestor of a Binary Tree
medium
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Validate Binary Search Tree
medium
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Word Search I
medium
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Binary Tree Maximum Path Sum
hard
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SolvedProblemDifficultyVideo SolutionCode
Find Right Interval
medium
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Find Median from Data Stream
hard
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Sliding Window Median
hard
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SolvedProblemDifficultyVideo SolutionCode
Kth Largest Element in an Array
medium
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K Closest Points to Origin
medium
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Top K Frequent Elements
medium
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SolvedProblemDifficultyVideo SolutionCode
Kth Smallest Element in a Sorted Matrix
medium
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Merge k Sorted Lists
hard
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Median of Two Sorted Arrays
hard
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SolvedProblemDifficultyVideo SolutionCode
Course Schedule
medium
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Course Schedule II
medium
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Minimum Height Trees
medium
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Alien Dictionary
hard
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SolvedProblemDifficultyVideo SolutionCode
0-1 Knapsack Problem
medium
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Partition Equal Subset Sum
medium
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Ones and Zeroes
medium
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Target Sum
medium
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Minimum Sum Partition
hard
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SolvedProblemDifficultyVideo SolutionCode
Coin Change
medium
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Coin Change II
medium
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SolvedProblemDifficultyVideo SolutionCode
Climbing Stairs
easy
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Min Cost Climbing Stairs
easy
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Fibonacci Number
easy
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House Robber
medium
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Unique Paths
medium
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Decode Ways
medium
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Number of Dice Rolls With Target Sum
medium
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SolvedProblemDifficultyVideo SolutionCode
Longest Palindromic Subsequence
medium
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Longest Palindromic Substring
medium
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Palindrome Partitioning
medium
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Palindromic Substrings
medium
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Minimum deletions to make a string palindrome
medium
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SolvedProblemDifficultyVideo SolutionCode
Longest Common Subsequence
medium
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Longest Increasing Subsequence
medium
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Maximum sum increasing subsequence
medium
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Edit Distance
hard
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Interleaving String
hard
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SolvedProblemDifficultyVideo SolutionCode
Implement Trie (Prefix Tree)
medium
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Search Query Auto complete
hard
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Word Search II
hard
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Designed with ❤️ by Saurav Gupta