47 lines
1.1 KiB
JavaScript
47 lines
1.1 KiB
JavaScript
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var input = 1352;
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[targetx, targety] = [31, 39];
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toBin = (number)=>(Number(number).toString(2).split("").map((a)=>(parseInt(a))));
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evenSum = (parts)=>(parts.reduce((a, b)=>(a+b))%2 == 0);
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checkCoord = (x, y)=>(evenSum(toBin(((x*x + 3*x + 2*x*y + y + y*y) + input))));
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var previous = [];
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function getNextCoords(x, y){
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var next = [];
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if(x > 0){
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if(checkCoord(x-1, y)){
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next.push([x-1, y]);
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}
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}
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if(y > 0){
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if(checkCoord(x, y-1)){
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next.push([x, y-1]);
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}
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}
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if(checkCoord(x+1, y)){
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next.push([x+1, y]);
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}
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if(checkCoord(x, y+1)){
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next.push([x, y+1]);
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}
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next = next.filter((pair)=>(previous.indexOf(pair.join(",")) == -1));
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next.forEach((pair)=>{previous.push(pair.join(","))});
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return next;
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}
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var coords = [[1,1]];
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function getNextAllCoords(){
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return coords.map((pair)=>(getNextCoords(pair[0], pair[1]))).reduce((a, b)=>(a.concat(b)), []);
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}
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var i = 0;
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while(coords.filter(([x,y])=>((x == targetx) && (y == targety))).length == 0){
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coords = getNextAllCoords();
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i++;
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console.log(i);
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}
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console.log("Steps: ", i);
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