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Problems

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Difficulty
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4038
Post-Order Traversal of a Tree
Very easy
4042
Median of Unions
Medium
4046
Mobile
Very hard
4073
Its a Murder!
Very easy
4117
Binary Search
Hard
4142
The Great XOR
Very easy
4147
Binary Search Tree 2
Medium
4150
Balance it!
Easy
4208
Degrees of two
Easy
4211
Gas stations
Very easy
4265
Secret Commands "Retreat"
Easy
4296
Counting 1`s
4360
Solarium for mushrooms
Very easy
4361
Solarium for mushrooms (Hard)
Very easy
4419
Dense forest
Very easy
4420
The root of a cubic equation
Very easy
4421
For fans of statistics
Easy
4422
Trains
Medium
4430
Points and Line Segments
Easy
4439
Exponentiation
Very easy
4496
Adventures of Dunno and His Friends
Very easy
4510
AND & OR & min on a segment
Very easy
4515
And again the chain
Easy
4516
Trees in the garden
Very easy
4641
Cliffs
Easy
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