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Algorithms
  • Introduction to Data Structures & Algorithms with Leetcode
  • Strings
    • Dutch Flags Problem
      • List Partitoning
    • Counters
      • Majority Vote
      • Removing Parentheses
      • Remove Duplicates from Sorted Array
    • Maths
      • Lone Integer
      • Pigeonhole
      • Check If N and Its Double Exist
      • Find Numbers with Even Number of Digits
    • Two Pointers
      • Remove Element
      • Replace Elements with Greatest Element on Right Side
      • Valid Mountain Array
      • Sort Array by Parity
      • Squares of a Sorted Array
      • Max Consecutive Ones
    • Sliding Window
      • Max Consecutive Ones 3
    • Stacks
      • Balanced Brackets
    • General Strings & Arrays
      • Move Zeros
      • Unique Elements
      • Merge Sorted Array
    • Matrices
      • Valid Square
      • Matrix Search Sequel
  • Trees
    • Untitled
  • Recursion
    • Introduction
    • Backtracking
      • Permutations
  • Dynamic Programming
    • Introduction
    • Minimum (Maximum) Path to Reach a Target
      • Min Cost Climbing Stairs
      • Coin Change
      • Minimum Path Sum
      • Triangle
      • Minimum Cost to Move Chips to The Same Position
      • Consecutive Characters
      • Perfect Squares
    • Distinct Ways
      • Climbing Stairs
      • Unique Paths
      • Number of Dice Rolls with Target Sum
    • Merging Intervals
      • Minimum Cost Tree From Leaf Values
    • DP on Strings
      • Levenshtein Distance
      • Longest Common Subsequence
  • Binary Search
    • Introduction
      • First Bad Version
      • Sqrt(x)
      • Search Insert Position
    • Advanced
      • KoKo Eating Banana
      • Capacity to Ship Packages within D Days
      • Minimum Number of Days to Make m Bouquets
      • Split array largest sum
      • Minimum Number of Days to Make m Bouquets
      • Koko Eating Bananas
      • Find K-th Smallest Pair Distance
      • Ugly Number 3
      • Find the Smallest Divisor Given a Threshold
      • Kth smallest number in multiplication table
  • Graphs
    • Binary Trees
      • Merging Binary Trees
      • Binary Tree Preorder Traversal
      • Binary Tree Postorder Traversal
      • Binary Tree Level Order Traversal
      • Binary Tree Inorder Traversal
      • Symmetric Tree
      • Populating Next Right Pointers in Each Node
      • Populating Next Right Pointers in Each Node II
      • 106. Construct Binary Tree from Inorder and Postorder Traversal
      • Serialise and Deserialise a Linked List
      • Maximum Depth of Binary Tree
      • Lowest Common Ancestor of a Binary Tree
    • n-ary Trees
      • Untitled
      • Minimum Height Trees
    • Binary Search Trees
      • Counting Maximal Value Roots in Binary Tree
      • Count BST nodes in a range
      • Invert a Binary Tree
      • Maximum Difference Between Node and Ancestor
      • Binary Tree Tilt
  • Practice
  • Linked Lists
    • What is a Linked List?
    • Add Two Numbers
      • Add Two Numbers 2
    • Reverse a Linked List
    • Tortoise & Hare Algorithm
      • Middle of the Linked List
  • Bitshifting
    • Introduction
  • Not Done Yet
    • Uncompleted
    • Minimum Cost For Tickets
    • Minimum Falling Path Sum
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Last updated 4 years ago

Valid Square
Matrix Search Sequel