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Problems

Graphs
Difficulty
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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
4027
Foul Play
Very hard
4028
Guards
Easy
4050
Funny Game
Easy
4063
Preparation for the Holiday
4069
Toll Roads
Very hard
4087
Longest path
Very easy
4089
Ideal Path
Easy
4090
Binary Matrix 2
4104
Distance in Tree
Very easy
4114
Heavy Cargo
Very easy
4120
Robot Navigation
4127
Operation: Merchant Boorinei
Easy
4128
Kingdoms
Very easy
4131
Non-boring sequences
Very easy
4132
Word equations
Very easy
4133
Farm and factory
Very easy
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