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Problems
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Problems

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Difficulty
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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-degrees of vertices
3986
Sources and sinks
3987
Complete graph
Very easy
3988
Transitivity of a graph
Easy
4002
Cheating away!
Very easy
4004
Is there a cycle?
Very easy
4011
Piece it together
Very easy
4013
Pool construction
4014
Smoking gun
4017
Train delays
Medium
4022
Admiral
Easy
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