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2684
Sorting
Medium
2685
Sequence
Very easy
2687
SumOfPowers
Hard
2688
Platforms
Easy
2689
Text Editor
Easy
2690
Two Vessels
Easy
2691
Passing grade
Very easy
2692
Catch Fantômas
Very easy
2693
Binary vs. Negative Binary
2694
Determinant
Very easy
2695
Binary Division
Very easy
2696
Genealogical Tree
2697
Staircase
Easy
2698
Malvina's Vacation
Easy
2699
Painting
Medium
2700
Factors
Easy
2701
Homework
Very easy
2702
The aliens
Easy
2703
The perfect party
Very easy
2704
The Roman numeral system
Very easy
2705
The union of sequences
Easy
2706
Splitting into factors
Easy
2707
Danger of explosion
Very easy
2708
Formation
Very easy
2709
Palindrome
Easy
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