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Problems

Graphs
Difficulty
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3789
Fly or not fly
3791
HaHa`s Morning
3824
3D Blobs
3835
Minimal Spanning Tree
Very easy
3849
Tree
3850
VAN DINSKY
Easy
3870
Aniuta and Google
Very easy
3877
Article
3878
Airlines - 2
3879
Blots on Paper
Very easy
3882
The Young Networker
Very easy
3903
Strengthening of Bridges
Easy
3909
The Tiv Tribe
Easy
3922
Forum
Easy
3931
Iguana
Hard
3944
Flood
Very hard
3945
Gadget Hackwrench
Very easy
3946
Hunt for Treasure!
3977
Red/Blue Spanning Tree
3979
Science!
3981
From adjacency matrix to adjacency list
3982
From adjacency list to adjacency matrix
3984
Sum of Squares with Segment Tree
Very easy
3985
Half-powers of vertices
3986
Sources and sinks
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