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Codeforces
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Codeforces Round 127 (Div. 1)
2012/06/29 23:30120 分钟201
Codeforces
AClear SymmetryClear Symmetry
1700
仅原文
BGuess That Car!Guess That Car!
1800
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CFragile BridgesFragile Bridges
2000
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DBrand New ProblemBrand New Problem
2600
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EThoroughly Bureaucratic OrganizationThoroughly Bureaucratic Organization
2600
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