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对。可以这样证明:第一个字符串有偶数个1。第二个字符串有奇数个1。翻两个相邻的字符不会改变整个字符串的奇偶性。所以不管怎么翻,第一个字符串永远有偶数个1。

bighorse (bighorse)
(#11452654@0)
2018-3-30 -04:00
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Back To Topic: 7 个硬币,从 HTHTTHH 到 HTHTHTT,每一步只能翻两个相邻的俩硬币,几步能达到?谢谢。

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