DKodeTree Roots 25 | Practice Problems

Practice Problems

Beginner

Strong roots make a strong tree.
That’s why I curated DKodeTree Roots 25, a collection of 25 hand‑picked beginner-friendly problems to help you build a solid foundation before moving on to more complex challenges.

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Showing 25 problems from DKodeTree Roots 25

	Two Sum			Easy
	Find Pivot Index			Easy
	Valid Parentheses			Easy
	Number of Recent Calls			Easy
	Valid Palindrome			Easy
	Binary Search			Easy
	Contains Duplicate II			Easy
	Relative Sort Array			Easy
	Linked List Cycle			Easy
	Delete Node in a Linked List			Medium
	Binary Tree Level Order Traversal			Medium
	Search in a Binary Search Tree			Easy
	Sort an Array			Medium
	Sort Colors			Medium
	Reverse Linked List			Easy
	Binary Tree Inorder Traversal			Easy
	Binary Tree Postorder Traversal			Easy
	Binary Tree Preorder Traversal			Easy
	N-ary Tree Preorder Traversal			Easy
	N-ary Tree Level Order Traversal			Medium
	Last Stone Weight			Easy
	Subsets			Medium
	Flood Fill			Easy
	Fibonacci Number			Easy
	Number of Common Factors			Easy