Solving day 7 #8
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Summary
Solving the day 7 puzzle. This works by iterating through every given coefficient and putting into a list the previous possibilities added and multiplied the coefficient. This solution works, but the worst case time is
O(2^n)which is terrible. If any of the possibilities are greater than the equation result, we abandon it. This is possible because each coefficient is a whole positive number, so it's impossible for the running total to decrease.