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Problems
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Problems

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Difficulty
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11122
Count the operations
Hard
11126
Bridges
Hard
11145
New White-Black Tree
Very hard
11268
Building Spanning Trees
Hard
11279
Game on a Tree
Hard
11281
Tree Permutations
Very hard
11348
Dead-End Detector
Very hard
11351
Hobson's Trains
Very hard
11510
Tree Distances II
Hard
11514
No legend
Very hard
11515
Tree
Hard
11516
Hit the road!
Very hard
11536
Conveyer
Very hard
11544
Boring tree queries
Very hard
11546
From XOR with love
Very hard
11566
The Cost of Speed Limits
Very hard
11574
’S No Problem
Hard
11609
Finding pairs
Medium
11625
Attack on Alpha-Zet
Hard
11637
Mountaineers
Very hard
11651
Кількість маршрутів
Very hard
11704
Ciel commander
Hard
11708
Infinity Tree
Hard
11710
Mirror Tree?
Very hard
11735
Pizzo Collectors
Very hard
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