In Combinatorics problem. (Updated with more info.) I asked how to efficiently distribute N cards amongst M pigeon holes where each hole must contain at least one card.

I've now realised that for some variations of the problem I dealing with, I need to allow for the situation where the first or last pigeon hole, or both, can be zero.

I thought this would be a simple tweak to the answers I already received; but once again I've come unstuck for an efficient solution. Is there one?

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In reply to Pideonholes revisited. by BrowserUk

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