Decide if a number can be reached starting with 1 by either adding five or multiplying by three in any number or combination of steps. For example, 15 can't be reached, but 13 can be reached by 1 * 3 + 5 + 5.
If the number can be reached, return true, if not, return false.
Hint : use recursion.
This one might be really hard.
That's what she said.
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