chore: create new project structure and aoc.py runner script

adventofcode/2024/day3/day3.py

@@ -0,0 +1,39 @@
+import re
+
+
+def main(content):
+    operations = re.findall(r"(?:mul\((\d+),(\d+)\))|(do\(\))|(don't\(\))", content)
+
+    # filter only mul instructions for part1, format: ('498', '303', '', '')
+    mul_operations = [x for x in operations if x[0].isnumeric()]
+    total = sum(int(a) * int(b) for a, b, *_rest in mul_operations)
+    print("Part 1: ", total)
+
+    do_mul = True
+    total = 0
+    for op in operations:
+        token = "".join(op)
+        print(token)
+        if token.startswith("don't"):
+            do_mul = False
+            print("disable_mul")
+        elif token.startswith("do"):
+            do_mul = True
+        elif token.isnumeric():
+            if do_mul:
+                a, b, *_rest = op
+                total += int(a) * int(b)
+        else:
+            raise RuntimeError(f"Invalid token {token}")
+    print("Part 2: ", total)
+
+
+if __name__ == "__main__":
+
+    import sys
+    infile = sys.argv[1]
+    
+    with open(infile) as f:
+        content = f.read()
+        main(content)
+