Evaluate IP Access Rules

You are given a list of IPv4 access-control rules. Each rule consists of: - an action: `allow` or `deny` - a CIDR block such as `192.168.0.0/16` You are also given a target IPv4 address such as `192.168.1.25`. Determine whether the target IP should be **allowed** or **denied**. Use the following rule semantics so the problem is fully specified: 1. A rule matches if the target IP belongs to that CIDR block. 2. If multiple rules match, the rule with the **longest prefix length** takes precedence. 3. If multiple matching rules have the same prefix length, the **later** rule in the input overrides the earlier one. 4. If no rule matches, return `deny`. Implement a function that takes a list of rules and one IPv4 address and returns the final decision. You may assume all inputs are valid IPv4 addresses and valid CIDR blocks, with prefix lengths from 0 to 32.