26 lines
1.3 KiB
JavaScript
26 lines
1.3 KiB
JavaScript
var moves = [[1, 0], [0, -1], [-1, 0], [0, 1]];
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var coords = [0, 0];
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var input = "R1, R1, R3, R1, R1, L2, R5, L2, R5, R1, R4, L2, R3, L3, R4, L5, R4, R4, R1, L5, L4, R5, R3, L1, R4, R3, L2, L1, R3, L4, R3, L2, R5, R190, R3, R5, L5, L1, R54, L3, L4, L1, R4, R1, R3, L1, L1, R2, L2, R2, R5, L3, R4, R76, L3, R4, R191, R5, R5, L5, L4, L5, L3, R1, R3, R2, L2, L2, L4, L5, L4, R5, R4, R4, R2, R3, R4, L3, L2, R5, R3, L2, L1, R2, L3, R2, L1, L1, R1, L3, R5, L5, L1, L2, R5, R3, L3, R3, R5, R2, R5, R5, L5, L5, R2, L3, L5, L2, L1, R2, R2, L2, R2, L3, L2, R3, L5, R4, L4, L5, R3, L4, R1, R3, R2, R4, L2, L3, R2, L5, R5, R4, L2, R4, L1, L3, L1, L3, R1, R2, R1, L5, R5, R3, L3, L3, L2, R4, R2, L5, L1, L1, L5, L4, L1, L1, R1";
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var steps = input.replace(/L/g, "R0, R0, R").split(", ").map((a)=>parseInt(a.substr(1)));
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var locations = [];
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function addCoord(x, y){
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if(!locations[x]){
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locations[x] = [];
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}
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if(!locations[x][y]){
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locations[x][y] = 0;
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}
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locations[x][y]++;
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}
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var coords = [0, 0]
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for(var step in steps){
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for(var i = 0; i < steps[step]; i++){
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coords = [coords[0] + moves[step%4][0], coords[1] + moves[step%4][1]];
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addCoord(coords[0], coords[1]);
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if(locations[coords[0]][coords[1]] == 2){
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console.log(coords);
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console.log(coords.map(Math.abs).reduce((a, b)=>(a + b)));
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}
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}
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}
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