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4 years ago
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let input = `forward 2
down 9
up 6
forward 1
down 5
down 7
down 9
forward 9
down 8
up 7
forward 2
up 6
forward 4
down 5
down 9
up 1
down 9
forward 8
forward 6
forward 6
forward 5
forward 9
up 3
up 5
forward 1
down 4
down 7
forward 2
up 3
down 8
forward 1
down 2
forward 3
up 1
up 1
up 7
forward 5
up 8
forward 8
forward 8
down 6
forward 1
forward 5
forward 4
forward 6
forward 5
down 6
down 9
forward 9
down 8
forward 6
down 5
forward 9
up 3
up 1
down 8
down 7
down 9
forward 7
down 8
down 9
down 5
down 3
forward 1
forward 6
down 1
forward 9
down 5
forward 7
up 2
down 8
forward 1
down 4
down 9
down 4
up 5
forward 4
forward 6
forward 1
down 3
forward 1
down 6
up 5
up 4
forward 6
forward 1
forward 1
down 2
up 4
up 3
up 2
up 6
down 6
forward 1
down 8
forward 1
up 6
forward 7
down 5
forward 4
forward 6
down 4
forward 4
down 4
down 4
forward 2
forward 8
down 5
down 1
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up 5
up 8
down 5
forward 4
down 6
up 7
forward 2
down 3
forward 2
forward 2
down 9
down 3
up 6
forward 8
up 2
up 9
forward 4
down 1
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forward 4
down 2
down 3
forward 5
down 4
forward 7
up 4
forward 6
up 8
forward 1
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down 4
forward 2
down 1
forward 7
down 3
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forward 5
down 3
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down 9
up 5
forward 2
down 8
up 9
forward 4
down 3
forward 3
forward 6
up 2
forward 3
down 1
down 1
down 1
forward 7
forward 4
forward 7
down 5
down 6
down 2
forward 6
down 3
up 6
forward 4
down 8
up 1
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down 2
down 5
forward 4
down 9
forward 2
forward 2
down 3
forward 3
down 1
forward 2
down 7
forward 3
forward 9
up 9
forward 6
forward 2
down 1
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forward 6
forward 6
down 3
up 3
forward 9
down 7
down 2
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down 7
forward 5
up 4
forward 8
down 5
forward 7
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up 7
down 8
forward 9
up 5
forward 1
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forward 5
down 9
forward 3
down 5
forward 8
forward 3
up 5
down 2
up 3
forward 2
up 1
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down 8
forward 2
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up 4
up 5
up 2
forward 9
forward 6
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up 9
forward 6
forward 4
forward 3
forward 7
up 1
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down 1
forward 8
down 1
forward 6
down 8
forward 8
down 7
down 6
down 5
forward 2
up 8
up 6
up 5
down 1
forward 1
down 1
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forward 7
forward 3
down 1
forward 5
forward 5
forward 8
down 1
up 2
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forward 6
forward 6
down 3
forward 9
up 4
forward 4
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up 1
forward 6
down 2
down 5
down 2
down 6
up 5
down 1
down 1
forward 3
forward 7
forward 3
up 2
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down 4
down 1
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down 1
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forward 6
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down 8
forward 4
down 6
down 7
forward 8
down 4
up 4
down 1
forward 1
forward 4
forward 1
up 9
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forward 7
down 4
forward 1
up 4
forward 4
down 5
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forward 5
forward 7
forward 1
forward 1
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forward 9
up 3
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down 2
forward 9
up 8
forward 3
up 5
down 3
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forward 8
down 6
forward 1
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up 9
down 2
forward 8
up 9
down 7
up 9
up 8
up 1
forward 6
forward 9
down 2
forward 8
down 1
up 4
forward 4
forward 7
up 2
forward 4
down 5
forward 3
down 2
down 7
down 4
down 2
up 5
down 5
down 5
down 4
up 1
forward 7
down 6
forward 5
forward 1
down 4
up 9
down 5
forward 7
forward 5
down 6
down 3
down 9
down 1
forward 6
up 2
down 7
down 3
down 6
up 3
down 4
down 4
forward 9
down 3
forward 2
down 9
down 8
up 4
down 2
forward 2
down 5
down 4
down 4
down 2
forward 6
down 3
forward 1
down 4
forward 7
down 5
up 4
down 6
forward 8
down 6
forward 2
forward 4
forward 5
forward 7
forward 4
forward 5
down 8
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forward 3
forward 5
up 7
forward 1
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forward 5
forward 4
forward 4
down 5
down 8
forward 8
down 1
down 1
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up 5
forward 6
down 6
forward 3
forward 4
forward 7
forward 4
down 8
forward 2
down 4
forward 4
down 1
up 2
forward 6
up 1
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down 9
forward 7
forward 2
up 3
down 2
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down 5
up 7
forward 1
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down 8
up 3
down 3
forward 9
up 4
down 5
up 5
down 1
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forward 9
down 3
up 6
forward 6
forward 1
down 1
forward 9
down 8
forward 8
down 6
up 9
down 4
up 3
up 9
forward 2
down 2
down 2
forward 3
down 2
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forward 4
up 8
forward 9
up 7
forward 2
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down 6
forward 8
up 7
forward 4
forward 3
up 5
down 8
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up 2
down 3
forward 6
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down 2
forward 7
forward 5
forward 7
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forward 2
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up 8
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forward 3
up 5
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up 7
down 4
down 1
forward 2
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up 4
down 3
up 1
forward 7
forward 7
forward 7
forward 8
down 1
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forward 9
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forward 7
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up 4
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forward 4
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forward 9
forward 9
down 1
forward 7
down 2
down 7
down 8
down 8
down 9
up 9
down 5
forward 5
forward 7
forward 4
down 7
forward 8
forward 1
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up 9
down 7
forward 9
forward 4
forward 8
down 9
forward 4
down 3
forward 3
down 1
down 1
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up 5
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down 1
down 8
forward 3
up 2
forward 7
down 3
down 8
down 1
forward 4
forward 7
down 5
forward 6
down 6
down 2
forward 6
down 3
up 4
down 7
forward 7
up 1
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down 1
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down 7
up 1
forward 7
down 2
forward 4
forward 6
forward 9
down 6
forward 2
up 8
down 2
up 2
up 5
down 8
up 6
down 9
forward 6
down 8
down 6
down 1
up 7
up 6
down 8
forward 2
up 7
forward 5
forward 7
forward 7
up 5
forward 2
down 9
up 2
up 8
up 2
down 3
down 7
forward 9
down 3
up 9
forward 8
up 8
forward 4
forward 8
forward 6
up 1
down 3
up 1
down 1
forward 2
forward 1
forward 4
forward 7
up 8
down 9
up 2
down 7
forward 4
down 3
forward 4
forward 2
down 9
forward 8
forward 5
forward 3
down 6
forward 4
forward 4
forward 9
forward 4
up 5
down 7
up 6
forward 5
down 5
forward 4
down 5
forward 7
forward 3
forward 5
down 5
forward 4
down 5
up 4
down 8
up 3
down 3
up 5
forward 4
forward 5
down 6
forward 6
forward 1
forward 8
down 6
down 9
up 5
forward 2
forward 8
up 6
down 6
forward 2
down 8
forward 7
forward 7
down 5
forward 5
forward 8
forward 1
down 4
down 2
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up 4
forward 3
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down 4
down 7
down 4
up 9
up 6
forward 1
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up 8
up 9
forward 2
forward 1
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forward 6
down 4
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up 2
up 1
forward 4
down 1
forward 8
forward 3
up 7
up 5
down 1
forward 8
forward 6
up 6
forward 9
down 5
down 9
forward 2
down 3
up 1
up 7
down 1
forward 8
up 9
down 1
down 5
down 7
down 5
down 5
down 5
up 9
forward 9
forward 7
forward 4
forward 6
down 5
down 3
forward 9
forward 1
down 1
down 8
up 4
down 9
forward 9
up 1
down 5
forward 8
up 6
forward 3
down 6
up 8
down 7
forward 3
forward 6
down 7
forward 6
forward 4
forward 4
down 4
forward 6
forward 5
down 6
forward 6
down 7
forward 6
forward 3
up 4
up 2
up 6
down 2
down 8
forward 5
forward 1
up 4
forward 7
forward 9
up 6
down 7
down 3
up 5
forward 5
down 8
up 1
down 1
down 3
down 2
down 1
forward 5
down 3
down 5
forward 7
forward 9
down 3
forward 7
forward 5
forward 4
forward 2
forward 7
forward 8
forward 6
down 8
forward 5
forward 6
forward 6
down 8
down 2
forward 4
down 7
forward 6
down 7
down 4
forward 6
up 6
forward 4
forward 9
forward 2
forward 3
forward 1
down 8
down 3
forward 4
up 3
forward 7
forward 1
down 7
down 8
forward 1
up 8
forward 8
up 8
down 5
forward 6
down 8
down 4
down 9
up 1
down 3
forward 6
down 6
forward 7
forward 3
down 6
down 6
forward 4
down 4
down 1
down 8
forward 2
forward 8
forward 8
down 6
forward 9
down 9
down 5
down 5
forward 7
down 1
forward 1
down 1
down 6
down 1
forward 1
up 6
up 9
forward 5
down 6
forward 8
forward 6
down 7
forward 1
forward 4
forward 9
forward 2
forward 4
down 2
forward 1
forward 8
down 1
down 1
forward 4
down 5
down 3
down 9
down 2
up 8
down 7
down 1
down 9
forward 2
forward 2
up 3
forward 3
down 3
forward 5
forward 9
down 7
up 7
down 9
forward 3
forward 7
down 1
forward 8
down 8
forward 1
down 8
down 6
forward 2
down 3
down 1
down 8
forward 3
up 5
down 7
up 2
up 8
forward 5
up 7
down 6
up 7
down 9
forward 5
up 4
forward 9
down 5
up 7
down 2
up 2
up 7
forward 5
down 6
forward 4
down 4
down 3
forward 2
up 2
down 5
forward 8
down 3
up 7
down 1
down 7
forward 7
forward 4
forward 7
down 2
down 9
down 6
down 9
down 2
down 9
down 7
down 5
forward 4
up 5
up 7
forward 2
forward 7
down 3
down 3
forward 4`
.split(/\n/)
.map((element) => {
let [direction, distance] = element.split(" ");
return { direction, distance: parseInt(distance) };
});
function calculatePosition(moves) {
let horizontal = 0;
let depth = 0;
let aim = 0;
for (const move of moves) {
switch (move.direction) {
case "forward":
horizontal += move.distance;
depth += aim * move.distance;
break;
case "up":
aim -= move.distance;
break;
case "down":
aim += move.distance;
break;
}
}
return { horizontal, depth, aim };
}
const { horizontal, depth } = calculatePosition(input);
console.log(horizontal * depth);
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