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Problems

Graphs
Difficulty
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3669
Fifteen Puzzle
Very hard
3678
Mandatory vertices
Very hard
3680
Tree Isomorphism
Easy
3690
Fingers
Easy
3691
Simple Monotony
Very easy
3697
Rooms
Hard
3704
Help Vasya
Very hard
3728
Cut a graph
Very easy
3730
The Cost of a Walk
Easy
3731
Trust
3740
Again About Horses
Easy
3745
Ants Colony
Very easy
3746
Bingo!
3753
Ingenious Metro
3755
Kids` Wishes
3756
Kinds of figures
Very easy
3758
Chain
3760
Queue
Hard
3761
Magic Labyrinth
Easy
3770
Chain-Confined Path
Very hard
3772
Patisserie ACM
3776
Outsourcing
3783
Treasure Diving
Very hard
3785
Count the Number of Cycles
Easy
3787
Knight Match Play
Very hard
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