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Re^4: Golf: Buying with exact change

by Anonymous Monk
on Feb 22, 2005 at 09:12 UTC ( #433290=note: print w/ replies, xml ) Need Help??


in reply to Re^3: Golf: Buying with exact change
in thread Golf: Buying with exact change

Well, only if there is a solution. For instance, if you plug in 4 and 2 in your solution, you'll get 2 as an answer - but it's obvious you can pay 2 exactly. Note that for 2 numbers there is a (finite) answer if and only if the 2 numbers are relative prime. (Which is easy to see, if they aren't relative prime, they share a prime number p in their factors. Which means that any amount you can pay will be a multiple of p.)


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