2024 - Day 3 part 2

2024/3/3_2.py

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+#!/usr/bin/env python
+# 2024 - Advent Of Code 3 - part 2
+
+import re
+
+# file = 'input_example2.txt'
+file = 'input.txt'
+
+# pylint: disable=consider-using-with
+input_lines = [line.strip('\n') for line in open(file, encoding="utf-8")]
+
+multilines = ''.join(input_lines)
+
+re_mul = re.compile(r'mul\((\d+),(\d+)\)')
+fmultilines = re.sub(r'don\'t\(\).+?do\(\)', '', multilines)
+
+
+# dirty hack, use 3 times in a row to remove all trailling don't()
+fmultilines2 = re.sub(r'(.+)don\'t\(\).*', r'\1', fmultilines)
+fmultilines3 = re.sub(r'(.+)don\'t\(\).*', r'\1', fmultilines2)
+fmultilines4 = re.sub(r'(.+)don\'t\(\).*', r'\1', fmultilines3)
+
+accum = 0
+m = re_mul.findall(fmultilines4)
+if m:
+    print(m)
+    m_list = [int(x[0]) * int(x[1]) for x in m]
+    # print(m_list)
+    accum += sum(m_list)
+
+print(f'{accum=}')

2024/3/input_example2.txt

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+xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))