Coding problems

Algorithm problems with tests in Python, JavaScript, Java, Go and C++, checked on our server.

Longest Unbroken RunUnion Find · Array · Hash TableMedium Drain the Landlocked PondsDepth-First Search · Breadth-First Search · Union FindMedium Land Regions on a MapDepth-First Search · Breadth-First Search · Union FindMedium Do the Links Form a TreeDepth-First Search · Breadth-First Search · Union FindMedium Islands After Each LandfillUnion Find · Array · Hash TableHard Isolated Groups in a NetworkDepth-First Search · Breadth-First Search · Union FindMedium Ratio Chain QueriesDepth-First Search · Breadth-First Search · Union FindMedium Clusters of Linked ServersDepth-First Search · Breadth-First Search · Union FindMedium The Extra CableDepth-First Search · Breadth-First Search · Union FindMedium The Extra Link in a Rooted TreeDepth-First Search · Breadth-First Search · Union FindHard Distinct Island ShapesDepth-First Search · Breadth-First Search · Union FindMedium Largest Forest PatchDepth-First Search · Breadth-First Search · Union FindMedium Island Shapes Up to SymmetryDepth-First Search · Breadth-First Search · Union FindHard Merge Contact CardsDepth-First Search · Breadth-First Search · Union FindMedium Chains of SynonymsDepth-First Search · Breadth-First Search · Union FindMedium Partners Side by SideGreedy · Depth-First Search · Breadth-First SearchHard Crossing at High TideDepth-First Search · Breadth-First Search · Union FindHard Split Into Two TeamsDepth-First Search · Breadth-First Search · Union FindMedium How Many Blocks FallUnion Find · Array · MatrixHard Fill a Single CellDepth-First Search · Breadth-First Search · Union FindHard One-Swap Word FamiliesDepth-First Search · Breadth-First Search · Union FindHard Two Teams Without FeudsDepth-First Search · Breadth-First Search · Union FindMedium Which Machine to CureDepth-First Search · Breadth-First Search · Union FindHard Which Machine to UnplugDepth-First Search · Breadth-First Search · Union FindHard Clear Tokens That Share a LineDepth-First Search · Union Find · GraphMedium Biggest Shared-Factor GroupUnion Find · Array · Hash TableHard A Board Cut by SlashesDepth-First Search · Breadth-First Search · Union FindMedium Consistent Letter EquationsUnion Find · Graph · ArrayMedium Landlocked Land CellsDepth-First Search · Breadth-First Search · Union FindMedium Interchangeable LettersUnion Find · StringMedium When Everyone Is LinkedUnion Find · Array · SortingMedium Route With the Highest BottleneckDepth-First Search · Breadth-First Search · Union FindMedium The Cheapest Road NetworkUnion Find · Graph · Minimum Spanning TreeMedium Water for the Whole VillageUnion Find · Graph · Minimum Spanning TreeHard Rearrange Through LinksDepth-First Search · Breadth-First Search · Union FindMedium Sealed IslandsDepth-First Search · Breadth-First Search · Union FindMedium Every Rewording of a SentenceUnion Find · Array · Hash TableMedium Servers Sharing a LineDepth-First Search · Breadth-First Search · Union FindMedium Rewire the Office NetworkDepth-First Search · Breadth-First Search · Union FindMedium Links That Form a Single TreeTree · Depth-First Search · Breadth-First SearchMedium Pipe TilesDepth-First Search · Breadth-First Search · Union FindMedium Required and Spare CablesUnion Find · Graph · Minimum Spanning TreeHard Same-Letter Loop in a GridDepth-First Search · Breadth-First Search · Union FindMedium Other Orders for the Same Search TreeTree · Union Find · Binary Search TreeHard Shared and Private RoadsUnion Find · GraphHard Cheapest Point WiringUnion Find · Graph · ArrayMedium Towns Joined by Big DivisorsUnion Find · Array · MathHard The Gentlest ClimbDepth-First Search · Breadth-First Search · Union FindMedium Cell Levels by Rows and ColumnsUnion Find · Graph · Topological SortHard Scooter Trips Under a Road LimitUnion Find · Graph · ArrayHard

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