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Answers and rating deltas for

how does the output became 2? don't understand

Author Votes Δ
Elliott Frisch 1 +0.13
Josimar 1 +3.25
Sthitaprajna Mishra 0 -2.27
Prog_G 0 -2.02
Last visited: Sep 5, 2020, 12:36:14 PM