Spot the rectangle (Part 2)
Given a window, how many subsets of a vector sum positive
Determine if input is a perfect number
Is this triangle right-angled?
Find similar sequences
Binpack Contest: Retro - - Best Packing
GJam 2016 Rd1A: Rank and File (small)
Criss_Cross_000 : Unique elements in a Square array
Graceful Graph: Wichmann Rulers
Tiles Contest: Perfect Solutions for Large Unique Tile Boards
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