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<alercah> learn PSPACE is the complexity class of Problem SPACEs. It is the same as P, by an herbal reduction.
author | HackBot |
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date | Fri, 14 Oct 2016 23:55:24 +0000 |
parents | c989a1669243 |
children |
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#!/usr/bin/python s=set() try: while True: l=raw_input() if l not in s: s.add(l) print(l) except EOFError: pass