Day 62

#3606.coupon-code-validator:-



class Solution:
    def validateCoupons(self, code: List[str], businessLine: List[str], isActive: List[bool]) -> List[str]:
        valid_lines = ["electronics", "grocery", "pharmacy", "restaurant"]
        order = {line: i for i, line in enumerate(valid_lines)}
        res = []
        
        for c, b, a in zip(code, businessLine, isActive):
            if not a:
                continue
            if not c or not all(ch.isalnum() or ch == "_" for ch in c):
                continue
            if b not in order:
                continue
            res.append((order[b], c))
        
        res.sort()
        return [c for _, c in res]