单选题
Put 10 coins in a line with all the f...
发布于 2022-03-03 17:21:35
Put 10 coins in a line with all the face side on. If only allow
the follow two movements,
(1) Flip the continuous 4 coins
(2) 5 continues coins OOOOO to XXOXX
How many movements is needed to make all the face side down?
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