Day 02 in awk

02/example_input

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+forward 5
+down 5
+forward 8
+up 3
+down 8
+forward 2

02/solution-part1.awk

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+BEGIN { FS=" " }
+
+/forward/ { h_pos += $2 }
+/down/    { depth += $2 }
+/up/      { depth -= $2 }
+
+END { print depth * h_pos }
+

02/solution-part2.awk

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+BEGIN { FS=" " }
+
+/down/    { aim += $2 }
+/up/      { aim -= $2 }
+/forward/ { 
+	h_pos += $2
+	depth += aim * $2
+}
+
+END { print depth * h_pos }
+