Not all people who ask simple questions are looking for easy homework answers. At the risk of being naughty I did not supply my ugly code, apologies for not following protocol.

If available, course materials are indeed useful but often lack the variety of ways of answering the problem. I am always amazed of the variety of solutions presented in forums, thanks to all who gave positive feedback.

In reply to Re^4: sequence of positions to binary sequence by coldy
in thread sequence of positions to binary sequence by coldy

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