Solve 2021 day 2

2021/02_dive.py

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+#!/usr/bin/env python3
+import sys
+
+DELTA = {'forward': (1, 0), 'up': (0, -1), 'down': (0, 1)}
+
+def parse(line):
+    direction, amount = line.split()
+    return DELTA[direction], int(amount)
+
+x = y = aimed_y = 0
+
+for (dx, dy), amount in map(parse, sys.stdin):
+    x += dx * amount
+    y += dy * amount
+    aimed_y += dx * y * amount
+
+print(x * y)
+print(x * aimed_y)

2021/input/2

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