Question: We're given categories that are organized hierarchically and a list of coupons where each coupon can be applied to certain categories. Coupons are valid for
We're given categories that are organized hierarchically and a list of coupons where each coupon can be applied to certain categories. Coupons are valid for child categories of categories it can be applied to
First question: Given a category, return list of coupons applicable to that category
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