老迟到可乐
Codeforces Round #623 (Div. 2, based on VK Cup 2019-2020 - Elimination Round, Engine) B. Homecoming
After a long party Petya decided to return home, but he turned out to be at the opposite end of the town from his home. There are n crossroads in the line in the town, and there is either the bus or t...
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