Does it work in any case?
I cannot show you the mathematical explanation but I have some hints. Let's take the example of the post but reversed:
-++-+--- *** +---+--- *** +++++--- *** ++++++++
These are exactly the same flips made above.
I think the key point here is that you should never touch happy pancakes, unless forced to do so because of a nearest unhappy one.
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I cannot show you the mathematical explanation but I have some hints.
Let's take the example of the post but reversed:
These are exactly the same flips made above.
I think the key point here is that you should never touch happy pancakes, unless forced to do so because of a nearest unhappy one.