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Level 1
Learn the basics
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Level 2
Learn Important Sorting Techniques
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Level 3
Solve Problems on Arrays [Easy -> Medium -> Hard]
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Level 4
Binary Search [1D, 2D Arrays, Search Space]
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Level 5
Strings [Basic and Medium]
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Level 6
Learn LinkedList [Single LL, Double LL, Medium, Hard Problems]
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Level 7
Recursion [PatternWise]
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Level 8
Bit Manipulation [Concepts & Problems]
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Level 9
Stack and Queues [Learning, Pre-In-Post-fix, Monotonic Stack, Implementation]
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Level 10
Sliding Window & Two Pointer Combined Problems
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Level 11
Heaps [Learning, Medium, Hard Problems]
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Level 12
Greedy Algorithms [Easy, Medium/Hard]
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Level 13
Binary Trees [Traversals, Medium and Hard Problems]
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Level 14
Binary Search Trees [Concept and Problems]
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Level 15
Graphs [Concepts & Problems]
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Level 16
Dynamic Programming [Patterns and Problems]
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Level 17
Tries
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Level 18
Strings
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Level 19
Design Data Structures
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