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Take your coding journey to the next level by exploring a diverse range of Challenges tailored to your skill set. Whether you're looking for specific platform-based challenges, different difficulty levels, or specialized categories, you can filter and find the perfect exercise to sharpen your logic and build your technical expertise.

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614 Challenges found

Title	Difficulty	Category	Likes	Action
Implement Interface with Class Declare an interface and implement it with a class using the implements keyword.	Medium	TypeScript	Like0	Solve
Priority Queue Kth Smallest Find the kth smallest element using sorted array (min-priority queue simulation).	Easy	Queue	Like0	Solve
DFS Graph Traversal Return the DFS traversal order of a graph starting from node 1.	Medium	Graph	Like0	Solve
Join Array with join() Use Array.join() to concatenate all elements of an array into a single string with a separator.	Easy	JavaScript	Like0	Solve
Minimum K Consecutive Bit Flips Find the minimum number of k-consecutive-bit flips to make all elements in a binary array become 1.	Hard	Sliding Window	Like0	Solve
Length of Last Word Find the length of the last word in a string. Teaches right-to-left traversal and memory-efficient string parsing without split.	Medium	String	Like0	Solve
List Properties with Object.keys() Use Object.keys() to return an array of a given object's own enumerable property names.	Easy	JavaScript	Like0	Solve
Find Index with indexOf() Use Array.indexOf() to find the first index of a specified element in an array, or -1 if not found.	Easy	JavaScript	Like0	Solve
Split and Join with String methods Use String.split() to divide a string into parts and String.join() to combine them back with a different separator.	Easy	Java	Like0	Solve
Longest Word Length Find the length of the longest word in a string. Teaches text splitting and running maximum tracking.	Medium	String	Like0	Solve
Sort Strings with localeCompare() Use String.localeCompare() to compare two strings for alphabetical sorting, returning -1, 0, or 1.	Easy	JavaScript	Like0	Solve
Sum of Natural Numbers Compute the sum of all natural numbers from 1 to n using the formula n × (n + 1) / 2. Covers the Gauss arithmetic series and compares O(1) vs O(n) approaches.	Easy	Math	Like0	Solve
Build Vector with push() Use Vec::push() to add elements to a vector one at a time, growing it dynamically.	Easy	Rust	Like0	Solve
Convert Case with toUpperCase() Use String.toUpperCase() and String.toLowerCase() to convert string case.	Easy	JavaScript	Like0	Solve
Search with String.indexOf() Use String.indexOf() to find the position of a character or substring within a string.	Easy	Java	Like0	Solve

Showing 1-15 of 614 Challenges