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Problems

Implementation
Difficulty
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8640
Numbers with odd digits
8643
Innohorse
Very easy
8653
Add subtract and multiply
8660
Tile
Medium
8666
Cow Cotillion
Very easy
8667
Cow Treats
Very easy
8679
Divide by 3
8680
Even neighbours
Very easy
8681
Product of nonzero digits
8682
Remove even digits
Very easy
8684
Sum and amount
Very easy
8685
Arithmetical mean
Very easy
8687
Perimeter of triangle
Very easy
8689
Function - 4
8690
Function - 5
8691
Oversized Pancake Flipper
Very easy
8693
Bathroom Stalls
Medium
8694
Fashion Show
Easy
8696
Grades
8697
Square string
8698
Repeated numbers
Very easy
8699
Find a sequence
Very easy
8700
Moda
8701
Grasshopper
Easy
8703
Robinson
Easy
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