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Preface
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Online Judges
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Time & Space Complexity
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Control Flow Practice
- if-else and else-if ladder Practice
- Loops Practice 1
- Loops Practice 2
- Loops Practice 3
- Loops Practice 4
- Square Star and Rhombus Star Patterns
- Triangle Star Patterns
- Pyramid Star Patterns
- Miscellaneous Star Patterns
- Number Patterns 1
- Number Patterns 2
- Triangular Number Patterns 1
- Triangular Number Patterns 2
- Triangular Number Patterns 3
- switch Statement Practice
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Arrays Basics
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String Basics
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Matrix Basics
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Math Basics
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Recursion Basics
- Introduction to Recursion - Understand Recursion by Examples
- Getting a hang of Recursion
- Most Asked Recursion Practice Problems with Solutions
- Fast Exponentiation Algorithm: Efficient Power Calculation Explained
- Find whether a given integer is a power of 3: Power of three
- Recursion: Time & Space Complexity Analysis - 1
- Recursion: Time & Space Complexity Analysis - 2
- Time Complexity Analysis Using Recurrence Relations
- Coming Soon..
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Sorting
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Two Pointer
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Prefix Sum
- Range Sum Query - Immutable
- Subarray Sum Equals K
- Minimum Penalty for a Shop
- Product of Array Except Self
- Sum of Absolute Differences in a Sorted Array
- Find Good Days to Rob the Bank
- Subarray Sums Divisible by K
- Make Sum Divisible by P
- Removing Minimum Number of Magic Beans
- Product of the Last K Numbers
- Count Number of Bad Pairs
- Continuous Subarray Sum
- Count of Interesting Subarrays
- Movement of Robots
- Find All Good Indices
- Count Number of Nice Subarrays
- Maximum Population Year
- Points That Intersect With Cars
- Pongal Bunk
- Car Pooling
- Shifting Letters II
- My Calendar II
- Left and Right Sum Differences
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Matrix
- Rotate Image
- Convert 1D Array Into 2D Array
- Row with Maximum ones
- Richest Customer Wealth
- Set Matrix Zeroes
- Queens That Can Attack The King
- Modify the Matrix
- Matrix Diagonal Sum
- Lucky Number in a Matrix
- Check if Matrix Is X-Matrix
- Transpose Matrix
- Spiral Matrix
- Prime In Diagonal
- Maximum Matrix Sum
- Largest Local Values in a Matrix
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Hashing
- Subarray Sum Equals K
- First Missing Positive
- Isomorphic Strings
- Find Common Elements Between Two Arrays
- Majority Element
- Majority Element II
- Contains Duplicate
- Subarray Sums Divisible by K
- Make Sum Divisible by P
- Count Number of Bad Pairs
- Continuous Subarray Sum
- Count of Interesting Subarrays
- Count Number of Nice Subarrays
- Sum of Unique Elements
- Optimal Partition of String
- Groups of Special-Equivalent Strings
- Word Subsets
- Find the Maximum Number of Elements in Subset
- People Whose List of Favorite Companies Is Not a Subset of Another List
- Custom Sort String
- Count the Number of Good Partitions
- Count Beautiful Substrings II
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Sliding Window
- Maximum Number of Occurrences of a Substring
- Longest Substring Without Repeating Characters
- Count the Number of Substrings With Dominant Ones
- Minimum Size Subarray Sum
- Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit
- Longest Repeating Character Replacement
- Max Consecutive Ones III
- Substrings of Size Three with Distinct Characters
- Minimum Window Substring
- Substring with Concatenation of All Words
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Linked List
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Stack
- Next Greater Element I
- Merge Intervals
- Insert Interval
- Valid Parentheses
- Asteroid Collision
- Minimum Add to Make Parentheses Valid
- Minimum Remove to Make Valid Parentheses
- Coming Soon..
- Maximum Nesting Depth of the Parentheses
- Reverse Substrings Between Each Pair of Parentheses
- Remove Outermost Parentheses
- Check if a Parentheses String Can Be Valid
- Min Stack
- Maximum Frequency Stack
- Score of Parentheses
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Queue
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Binary Search
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Bit Manipulation
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Recursion and Backtracking
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Trees
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Heaps
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Tries
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Greedy
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Dynamic Programming
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Graphs
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String Matching Algorithms
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Combinatorics
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Geometry
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Game Theory
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Advanced Algorithm