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

adventofcode/2021/day2/day2.py

@@ -0,0 +1,44 @@
+def part1(inp):
+    horizontal_pos = 0
+    depth = 0
+    for line in inp:
+        command, amount = line.split(" ")
+        if command == "forward":
+            horizontal_pos += int(amount)
+        elif command == "up":
+            depth -= int(amount)
+        elif command == "down":
+            depth += int(amount)
+        #print(f"horizontal {horizontal_pos}, depth {depth}")
+    print("Part 1", horizontal_pos * depth)
+
+
+def part2(inp):
+    horizontal_pos = 0
+    depth = 0
+    aim = 0
+    for line in inp:
+        command, amount = line.split(" ")
+        if command == "forward":
+            horizontal_pos += int(amount)
+            # It increases your depth by your aim multiplied by X.
+            depth += aim * int(amount)
+        elif command == "up":
+            aim -= int(amount)
+        elif command == "down":
+            aim += int(amount)
+        #print(f"horizontal {horizontal_pos}, depth {depth}")
+    print("Part 2", horizontal_pos * depth)
+
+
+def main(input_file):
+    with open(input_file) as f:
+        entries = f.readlines()
+        part1(entries)
+        part2(entries)
+
+
+if __name__ == "__main__":
+    import sys
+    infile = sys.argv[1] if len(sys.argv) > 1 else "example.txt"
+    main(infile)