Ready to move beyond tutorials and truly build? The LabEx Web Development learning path is your blueprint. It’s not just about learning syntax; it’s about mastering the underlying logic that powers every great application. This path offers a structured, hands-on journey from HTML/CSS fundamentals to advanced back-end frameworks, all through interactive, non-video modules. But before you deploy your first full-stack app, you need to sharpen your algorithmic thinking. We've curated five beginner-friendly, yet crucial, coding challenges that act as the perfect warm-up for any aspiring developer. Think of these as the foundational strength training for your coding muscles.
Combination Sum with Distinct Integers
Difficulty: Beginner | Time: 5 minutes
In this challenge, we will be working with an array of distinct integers called candidates and a target integer called target. Our goal is to find all unique combinations in candidates where the numbers sum to target. We will write a function named combinationSum in the provided combinationSum.js file to solve this problem. The function should return the combinations in any order. The challenge also provides examples to clarify the task at hand.
Practice on LabEx → | Tutorial →
Subsequence Counting in Python
Difficulty: Beginner | Time: 5 minutes
In this challenge, we will be writing a function called numDistinct that takes in two strings, s and t, and counts the number of distinct subsequences of s that equal t. The function should return the total count of distinct subsequences. We will need to implement the logic inside the numDistinct function to solve this problem.
Practice on LabEx → | Tutorial →
Complete Binary Tree Node Count
Difficulty: Beginner | Time: 5 minutes
In this challenge, we will write a function called countNodes that takes in the root of a complete binary tree and counts the number of nodes in the tree. The function should return the total count of nodes in the tree. We need to ensure that the function is exported correctly for it to pass the submission.
Practice on LabEx → | Tutorial →
Combine Numbers from Range
Difficulty: Beginner | Time: 5 minutes
In this challenge, we will be working with a function called combine that takes two integers n and k as input. The purpose of this function is to return all possible combinations of k numbers from the range [1, n]. The combinations can be returned in any order. The function should be implemented in a file called combine.js and exported as a module.
Practice on LabEx → | Tutorial →
Find kth smallest element in BST
Difficulty: Beginner | Time: 5 minutes
In this challenge, we will implement an algorithm to find the kth smallest element in a binary search tree (BST). Given the root of the BST and an integer k, the goal is to find the kth smallest element in the tree. We will write a function called kthSmallest that takes the root and k as parameters and returns the kth smallest element.
Practice on LabEx → | Tutorial →
These five challenges are more than just coding puzzles; they are concentrated lessons in the algorithmic thinking required to be a high-caliber web developer. By dedicating just 5 minutes to each, you build the logical foundation necessary to tackle the larger projects in the Web Development path. Stop passively watching and start actively building your logic today. Dive into the LabEx Web Development path and transform these foundational skills into real-world applications!
Top comments (0)