XCPC Nanjing Regional Problem Solutions: B, G, and H
Problem B: What, More Kangaroos?
Operations 1 and 2 nullify eachother, as do operations 3 and 4. The problem reduces to applying positive integer operations on two buttons only, yielding four enumeration cases.
With operations 1 and 3 chosen, let operation 1 execute x times and operation 3 execute y times (x, y > 0). The goal is maximizing i ...
Posted on Mon, 06 Jul 2026 17:09:43 +0000 by jgetner
Comprehensive Guide to Using Regular Expressions in Python
Overview
Python's re module provides powerful tools to pattern matching within strings.
The basic syntax for matching is:
import re
result = re.match(pattern, string)
When using regular expressions, it's essential to prefix the pattern with an r to prevent Python from interpreting backslashes as escape characters.
Matching Single Characters
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Posted on Thu, 07 May 2026 05:15:27 +0000 by Sealr0x