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Problems
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Problems

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Difficulty
Sort by
763
Greenhouse
Very easy
766
Resistance
Easy
770
Peg Game
Very easy
772
Bard
Very easy
779
Message in the Enemy Territory
782
Informants
783
Look-and-Say sequences
Very easy
784
Burger Time?
Very easy
787
Langton's Ant
791
`JBC`
792
Loan Scheduling
793
Showstopper
Very easy
797
Arne Saknussemm
Very easy
817
Broken Calculator
Easy
821
Grasshopper
Medium
822
Unpacking a line
Very easy
831
Expression
Easy
835
Poker
Very easy
836
Prime numbers 2
Easy
840
Long sum
Very easy
841
Spiral
842
The prime factors
Easy
845
The card and envelope
Medium
847
Snake
Very easy
848
Perfect numbers
Easy
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