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Problems
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Problems

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Difficulty
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5070
Isolator
Very easy
5072
Count the number of edges
Easy
5075
Half-degrees of vertices by edge lists
Very easy
5076
Regular graph
Easy
5077
Semi-complete graph
Very easy
5078
Graph tournament
Very easy
5079
Transitivity of directed graph
Very easy
5082
Degrees of vertices
Very easy
5129
Mad Veterinarian
Hard
5135
Graph Connectivity
Very easy
5140
Swamp
Easy
5159
Kingdom of Magic
5174
Pete's dad
Easy
5178
Cycle
Easy
5180
Network Breach
Hard
5181
Hitchhiking Across the Galaxy
Easy
5209
Aquarium Seller
Easy
5218
LCA Problem Revisited
Very easy
5219
Caves and Tunnels (Easy)
5221
Alliances
Very hard
5229
Control chain
Very hard
5231
Duty
Medium
5240
Cohesive team
Medium
5245
Boat
Very hard
5271
Viral Ethics
Very easy
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