Design
27 problems
Design problems ask you to implement a data structure or system with specific API contracts. Common designs: LRU Cache (HashMap + doubly linked list), LFU Cache, Min Stack, Iterator, and streaming median. Focus on the time complexity required for each operation.
- 146.LRU CacheMedium
- 303.Range Sum Query - ImmutableEasy
- 304.Range Sum Query 2D - ImmutableMedium
- 352.Data Stream as Disjoint IntervalsUnknown
- 432.All O`one Data StructureUnknown
- 460.LFU CacheHard
- 641.Design Circular DequeUnknown
- 703.Kth Largest Element in a StreamEasy
- 706.Design HashMapUnknown
- 707.Design Linked ListMedium
- 729.My Calendar IMedium
- 731.My Calendar IIUnknown
- 855.Exam RoomUnknown
- 981.Time Based Key-Value StoreMedium
- 1261.Find Elements in a Contaminated Binary TreeMedium
- 1352.Product of the Last K NumbersMedium
- 1381.Design a Stack With Increment OperationUnknown
- 1622.Fancy SequenceUnknown
- 1865.Finding Pairs With a Certain SumUnknown
- 1912.Design Movie Rental SystemUnknown
- 2043.Simple Bank SystemUnknown
- 2349.Design a Number Container SystemMedium
- 2353.Design a Food Rating SystemMedium
- 3408.Design Task ManagerUnknown
- 3484.Design SpreadsheetMedium
- 3508.Implement RouterUnknown
- 3607.Power Grid MaintenanceUnknown