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Problems
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Problems

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Difficulty
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2751
Iterated Difference
2752
Shape Number
Very easy
2754
Contour Tracing
Very easy
2757
User Names
2758
Citizenship Application
Very easy
2762
Bacon's Cipher
Very easy
2766
Length of S(n)
Very easy
2772
DDR3
Very hard
2777
Houses
Very easy
2779
Traffic Lights
Easy
2790
Damaged XML
2792
Rectangle
Very easy
2795
Metro
Easy
2799
Gnome in the Castle
Easy
2812
Angle
Very easy
2828
Polynomial
2831
HTML
Hard
2833
Matches – for children?
Easy
2864
Function tabulation
2865
High Dragon Curve
Hard
2866
Dragon Curve Junior
Very easy
2867
K-digit number High
Hard
2874
Queens Junior
Easy
2887
PreQueL
2895
Arctic Foxes
Very easy
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