Browse Challenges

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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261 Challenges found

Title	Difficulty	Category	Likes	Action
Campus Shuttle Path with Dijkstra Return the actual shortest path, not just its total cost.	Medium	Graph	Like0	Solve
Courier Toll Route with Dijkstra and One Pass Use Dijkstra with an extra state to minimize delivery cost when one toll can be skipped.	Medium	Graph	Like0	Solve
Museum Exit Route with Dijkstra and Closed Rooms Find the cheapest route while avoiding rooms that are temporarily closed.	Medium	Graph	Like0	Solve
Campus Announcement Delay with Dijkstra Measure how long it takes one start node to reach every node in a directed weighted network.	Easy	Graph	Like0	Solve
Delivery Fee with Dijkstra Find the cheapest delivery cost in a directed route network.	Easy	Graph	Like0	Solve
Shuttle Time with Dijkstra Find the minimum shuttle travel time between two stops in a weighted route map.	Easy	Graph	Like0	Solve
Daily Sales Rollup with TreeMap Combine repeated day entries and return the totals in sorted date order using TreeMap.	Medium	Java	Like0	Solve
First Unique Customer with LinkedHashMap Find the first customer name that appears exactly once by using LinkedHashMap.	Medium	Java	Like0	Solve
Top Three Scores with PriorityQueue Keep only the three highest scores by using a PriorityQueue.	Medium	Java	Like0	Solve
Locker Lookup with HashMap Build a student-to-locker lookup using HashMap and return the target locker number.	Easy	Java	Like0	Solve
Duplicate Coupon Check with HashSet Detect whether any coupon code appears more than once using HashSet.	Easy	Java	Like0	Solve
Guest Queue with ArrayList Append walk-in guests after the confirmed guest list using ArrayList.	Easy	Java	Like0	Solve
Catalog Price Merge with toMap() Build a price lookup map from catalog entries using Java Stream API toMap() with a merge rule.	Medium	Java	Like0	Solve
Room Schedule Merge with flatMap() Flatten multiple room schedules into one cleaned session list using Java Stream API flatMap().	Medium	Java	Like0	Solve
Club Signup Summary with groupingBy() Group club sign-up slips into a summary map using Java Stream API groupingBy().	Medium	Java	Like0	Solve

Showing 1-15 of 261 Challenges