Remove the polynomials that have positive real elements of their roots.
Project Euler: Problem 6, Natural numbers, squares and sums.
Construct a string from letters and counts
Sum of first n terms of a harmonic progression
Minimum Distance between two N-sided Polygons
GJam 2013 Veterans: Hedge
Sokoban: Puzzle 10.45
TRON Tourney 010: Fixed Pattern CCW
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