34 lines
1.4 KiB
Text
34 lines
1.4 KiB
Text
y 2: Dive! ---
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Now, you need to figure out how to pilot this thing.
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It seems like the submarine can take a series of commands like forward 1, down 2, or up 3:
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forward X increases the horizontal position by X units.
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down X increases the depth by X units.
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up X decreases the depth by X units.
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Note that since you're on a submarine, down and up affect your depth, and so they have the opposite result of what you might expect.
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The submarine seems to already have a planned course (your puzzle input). You should probably figure out where it's going. For example:
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forward 5
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down 5
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forward 8
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up 3
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down 8
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forward 2
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Your horizontal position and depth both start at 0. The steps above would then modify them as follows:
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forward 5 adds 5 to your horizontal position, a total of 5.
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down 5 adds 5 to your depth, resulting in a value of 5.
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forward 8 adds 8 to your horizontal position, a total of 13.
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up 3 decreases your depth by 3, resulting in a value of 2.
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down 8 adds 8 to your depth, resulting in a value of 10.
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forward 2 adds 2 to your horizontal position, a total of 15.
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After following these instructions, you would have a horizontal position of 15 and a depth of 10. (Multiplying these together produces 150.)
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Calculate the horizontal position and depth you would have after following the planned course. What do you get if you multiply your final horizontal position by your final depth?
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