水郁

摘要： Mihahim has a string s. He wants to delete exactly one character from it so that the resulting string would be a palindrome. Determine if he can do it 阅读全文

摘要： Description Berland has n cities, the capital is located in city s, and the historic home town of the President is in city t (s ≠ t). The cities are c 阅读全文