CoinReturn
How many ways can you give back coins for a given amount.
%{1 => 11} %{1 => 6, 5 => 1} %{1 => 1, 5 => 2} %{1 => 1, 10 => 1}
How many ways can you give back coins for a given amount.
%{1 => 11} %{1 => 6, 5 => 1} %{1 => 1, 5 => 2} %{1 => 1, 10 => 1}