23 lines
634 B
JavaScript
23 lines
634 B
JavaScript
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var input = require("fs").readFileSync("input.txt").toString().replace(/\r/g, "");
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var cogs = input.split("\n").filter((a)=>(a)).map((line)=>{
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var lineParts = line.match(/Disc #([1-9]+) has ([1-9]+) positions; at time=0, it is at position ([0-9]+)./);
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return {
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number: parseInt(lineParts[1]),
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positions: parseInt(lineParts[2]),
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startPos: parseInt(lineParts[3]),
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};
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}).sort((a, b)=>(a.number - b.number));
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var t = -1;
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var solved = false;
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while(!solved){
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solved = true;
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t++;
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for(var cog of cogs){
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if(((cog.number + cog.startPos + t) % cog.positions) != 0){
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solved = false;
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}
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}
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}
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console.log(t);
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