avatar Bite 277. Number of coin changes

Pat is going to apply for a cashier job in the local supermarket.

His friends suggested to brush up his basic math skills, particularly how to make changes in different coin denominations.

Can you help him leveraging your programming skills?

Given a list of positive integers representing coins denominations, and a positivie integer N representing the requested change of money, come up with a function that calculates the number of ways to make the change using the given coins. 

You can assume there is an unlimited amount of coins in each denominations.

## Example:

n = 5 and coins = [1, 2, 5, 10]

>> make_change(n, coins)
4 (five "1", 1+1+1+2, 1+2+2, and one "5")

>>> make_change(6, coins)
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