28 lines
603 B
JavaScript
28 lines
603 B
JavaScript
var fs = require("fs");
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var input = fs.readFileSync("input.txt").toString().replace(/\r/g, "");
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var moves = {
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U: -3,
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D: 3,
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L: -1,
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R: 1
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};
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var prev = 5;
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var locations = input.split("\n").slice(0, -1).map(function(curr, i, arr){
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return curr.split("").reduce(function(pos, char){
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var newpos = pos + moves[char];
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if(Math.abs(moves[char]) == 1){
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if(Math.abs((newpos - 1)%3 - (pos - 1)%3) == 1){
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prev = newpos;
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}
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}
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else{
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if(newpos >= 1 && newpos <= 9){
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prev = newpos;
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}
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}
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return prev;
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}, prev);
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});
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console.log(locations.join(""));
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