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The money changing problem is a simple one to state. For example, how many different ways can one form change of a dollar (100 cents) by using only coins of denomination [1 5 10 25 50] ? (The answer is 292.)
Its an example of a general problem, i.e., in how many unique ways can an integer be partitioned as a sum of smaller positive integers?
http://en.wikipedia.org/wiki/Integer_partition
I wrote partitions to solve the fully general problem, but it can be used with restrictions too. You can constrain the set of elements in the sum, and the maximum number of times any one elements can appear, as well as fixing the total number of terms that will appear in the final sum.
See the demo for a few examples of use.
引用
John D'Errico (2026). Partitions of an integer (https://jp.mathworks.com/matlabcentral/fileexchange/12009-partitions-of-an-integer), MATLAB Central File Exchange. に取得済み.
