Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it. Brian Kernighan
Coin Change is the problem of finding the number of ways of making changes for a particular amount of cents, n, using a given set of denominations d1,… dn.
General coin change that keeps track of coins: [5, 5]