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educationApr 17, 20182:41pending

两位象棋大师在下棋

英语小小孩

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两位象棋大师在下棋,下了5盘棋后,统计发现两位大师各自赢棋的盘数相等!这是怎么回事?语音里公布了答案,如果你没有听懂,就发信息给我,我解释中文给你听。

上次的信使难题,他们的解决方法类似密码学中的一种算法。送信人a在盒子上锁上一把锁x。收信人b在收到盒子后没有锁x的钥匙,b就再锁上自己的一把锁y,然后把盒子寄回给a。a收到盒子后打开锁x,再把盒子寄给b。这时的盒子上还剩一把锁y。b收到盒子后再把锁y打开就能打开这个盒子了。

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两位象棋大师在下棋

英语小小孩

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