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Implement a firewall class that evaluates IPv4 addresses against an ordered list of ALLOW/DENY rules.
Rules can specify single hosts or CIDR blocks, with decision priority determined strictly by insertion order.
Return true or false based on the action of the first rule that matches the queried IP.
What This Tests
Bitwise manipulation and 32-bit integer arithmetic
Network addressing fundamentals and CIDR prefix matching
Ordered data structure traversal and priority-based filtering
String parsing and data normalization
Common Patterns
Bit Manipulation
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