Union-Find

74 LeetCode questions

Difficulty Distribution

Easy
1
1%
Medium
39
53%
Hard
34
46%

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Questions

TitleDifficulty
Number of IslandsMedium
Divide Nodes Into the Maximum Number of GroupsHard
Longest Consecutive SequenceMedium
Surrounded RegionsMedium
Number of ProvincesMedium
Max Area of IslandMedium
Making A Large IslandHard
Accounts MergeMedium
Number of Operations to Make Network ConnectedMedium
Evaluate DivisionMedium
Redundant ConnectionMedium
Swim in Rising WaterHard
Is Graph Bipartite?Medium
Similar String GroupsHard
Most Stones Removed with Same Row or ColumnMedium
Regions Cut By SlashesMedium
Number of EnclavesMedium
Number of Closed IslandsMedium
Find Critical and Pseudo-Critical Edges in Minimum Spanning TreeHard
Min Cost to Connect All PointsMedium
Path With Minimum EffortMedium
Count Sub IslandsMedium
Find if Path Exists in GraphEasy
GCD Sort of an ArrayHard
Find All People With SecretHard
Count Unreachable Pairs of Nodes in an Undirected GraphMedium
Minimum Cost Walk in Weighted GraphHard
Count the Number of Complete ComponentsMedium
Check if the Rectangle Corner Is ReachableHard
Subarray With Elements Greater Than Varying ThresholdHard
Count Servers that CommunicateMedium
Make Lexicographically Smallest Array by Swapping ElementsMedium
Maximum Number of Fish in a GridMedium
Minimum Score of a Path Between Two CitiesMedium
Detect Cycles in 2D GridMedium
Data Stream as Disjoint IntervalsHard
Possible BipartitionMedium
Lexicographically Smallest Equivalent StringMedium
Minimize Malware SpreadHard
Last Day Where You Can Still CrossHard
Minimum Operations to Equalize Binary StringHard
Number of Good PathsHard
Power Grid MaintenanceMedium
Minimum Time for K Connected ComponentsMedium
Minimum Reverse OperationsHard
Maximum Number of Points From Grid QueriesHard
Minimize Maximum Component CostMedium
Couples Holding HandsHard
Smallest String With SwapsMedium
Rank Transform of a MatrixHard
Satisfiability of Equality EquationsMedium
Number of Ways to Reorder Array to Get Same BSTHard
Minimum Number of Visited Cells in a GridHard
Remove Max Number of Edges to Keep Graph Fully TraversableHard
Minimize Malware Spread IIHard
Maximum Partition FactorHard
Bricks Falling When HitHard
Largest Component Size by Common FactorHard
Checking Existence of Edge Length Limited PathsHard
Minimize Hamming Distance After Swap OperationsMedium
Process Restricted Friend RequestsHard
Longest Uploaded PrefixMedium
Find the Safest Path in a GridMedium
Redundant Connection IIHard
Validate Binary Tree NodesMedium
Find the String with LCPHard
Path Existence Queries in a Graph IMedium
Count Islands With Total Value Divisible by KMedium
Maximize Alternating Sum Using SwapsHard
Maximum Segment Sum After RemovalsHard
Groups of StringsHard
Reachable Nodes With RestrictionsMedium
Check if There is a Valid Path in a GridMedium
Graph Connectivity With ThresholdHard

Showing 74 of 74 questions