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Problems

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Difficulty
Sort by
3968
Square root
Very easy
3969
Diplomas
Very easy
3970
Mutants
Easy
4016
Tracking RFIDs
Medium
4031
Joint Venture
Easy
4034
Minimum and Maximum in a tree
Easy
4035
Ice-Cream
Medium
4036
Pre-Order Traversal of a Tree
Very easy
4038
Post-Order Traversal of a Tree
Very easy
4042
Median of Unions
Medium
4046
Mobile
Very hard
4073
Staircase Patterns
Very easy
4117
Binary Search
Hard
4126
Lightbulb Testing
Hard
4142
The Great XOR
Very easy
4147
Binary Search Tree 2
Medium
4150
Balance it!
Easy
4169
Plotter
Hard
4208
Powers of two
Easy
4211
Gas stations
Very easy
4265
Secret Commands "Retreat"
Easy
4307
Rain
Hard
4343
Flags for Provinces
Hard
4360
Solarium for mushrooms
Very easy
4361
Solarium for mushrooms (Hard)
Very easy
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