solve day 3 part 1

day_03/program.py

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+#!/usr/bin/env python3
+
+# https://adventofcode.com/2024/day/3
+
+import re
+
+
+def get_lines(filename: str) -> list:
+    with open(filename, "r") as file:
+        return [line.strip() for line in file.readlines()]
+
+
+def main():
+    # lines = get_lines("sample-input.txt")
+    lines = get_lines("input.txt")
+
+    result_sum = 0
+    for line in lines:
+        matches = re.findall(r"mul\((\d+),(\d+)\)", line)
+        for match in matches:
+            result_sum += int(match[0]) * int(match[1])
+
+    print("Part 1: The sum of the results is", result_sum)
+
+
+if __name__ == '__main__':
+    main()