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Important Problems on Different Data Structures and Algorithms from Leetcode & Gfg , with Brute & optimised Solutions in Java Programming Language depicting solving patterns in questions & are well commented whereever neccessary with the approach as well as the time & space complexity along with self-understanding commit messages :)

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Important Algorithms & Questions for different data structures ✔️


1. DYNAMIC PROGRAMMING 🔥


You can checkout all the solutions in the DP section with Recursive , Memoization , Tabulation & Space Optimisation following the order along with their well commented Time & Space Complexities 😎🚀

Video Solution Problem - Pattern Question Link
Video 1-D DP Fibonacci Number
Video 1-D DP Climbing Stairs
Video 1-D DP Frog Jump
Video 1-D DP Frog Jump-With K distance
Video DP on Subsequences Maximum Sum of Non-Adjacent Elements - House Robber
Video DP on 2D-MATRIX-INTRO Ninja’s Training
Video DP on Grids Grid Unique Paths
Video DP on Grids Grid with Maze Obstacles
Video DP on Grids Minimum Path Sum in Grid
Video DP on Grids-Fixed Starting Traingle
Video DP on Grids-Variable Starting Minimum/Maximum Falling Path Sum
Video DP on Subsequences/ Subsets Subset Sum Equals to Target
Video DP on Subsequences/ Subsets Partition Equal Subset Sum
Video DP on Subsequences/ Subsets Partition A Set Into Two Subsets With Minimum Absolute Sum Difference
Video DP on Subsequences/ Subsets Counts Subsets with Sum K
Video Dp on Subsequences/ Subsets Count Partitions With Given Difference
Video Dp on Subsequences/ Subsets 0/1 Knapsack
Video Dp on Subsequences/ Subsets Minimum Coins - Coin Change
Video Dp on Subsequences/ Subsets Target Sum
Video Dp on Subsequences/ Subsets Minimum Coins - Coin Change-2
Video Dp on Subsequences/ Subsets Unbounded Knapsack
Video Dp on Strings Rod Cutting Problem
Video Dp on Strings Longest Common Subsequence
Video Dp on Strings Print Longest Common Subsequence
Video Dp on Strings Longest Common Substring
Video Dp on Strings Longest Palindromic Subsequence
Video Dp on Strings Minimum Insertions to Make String Palindrome
Video Dp on Strings Minimum Insertions/Deletions to Convert String A to String B
Video Dp on Strings Shortest Common Supersequence

2. Binary Trees & Binary Search Trees 🔥

Video Solution Problem Name Question Link
Video Representation In Java Binary Tree Representation in Java
Video Recursive - Pre -Order Traversal Preorder Traversal of Binary Tree
Video Recursive - In -Order Traversal Inorder Traversal of Binary Tree
Video Recursive - Post-Order Traversal Postorder Traversal of Binary Tree
Video Level Order - Traversal - Queue Data Structure Level Order Traversal of Binary Tree

3. GRAPHS 🔥

Video Solution Problem Name Question Link
Video Introduction to Graph - Different Conventions Used
Video Representation in JAVA

3. Basic Maths 🔥

Problem Name Question Link
Count Digits Count Digits
Reverse A Integer Reverse Integer

4. Sliding Window 🔥

Problem Name Question Link
Max Sum Subarray of size K Max Sum Subarray of size K

5. Stacks 🔥

Problem Name Question Link
Stack Implementation using Arrays Implementation
Stack Implementation using LinkedList Implementation

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Important Problems on Different Data Structures and Algorithms from Leetcode & Gfg , with Brute & optimised Solutions in Java Programming Language depicting solving patterns in questions & are well commented whereever neccessary with the approach as well as the time & space complexity along with self-understanding commit messages :)

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