Codeforces205E Little Elephant and Furik and RubikLittle Elephant and Furik and Rubik
摘要:题意:两个长度相同的字符串,在两个字符串中选取相同长度的子串,所有情况概率相同,问对应位置相同的期望是多少?
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posted @ 2018-01-17 20:02
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