36 lines
974 B
JavaScript
36 lines
974 B
JavaScript
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const fs = require('fs');
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function grid(size) {
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let lights = {};
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for (let y = 0; y <= size; y++) {
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for (let x = 0; x <= size; x++) {
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lights[`${x},${y}`] = false;
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}
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lights[`${y}n`] = '\n';
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}
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return lights;
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}
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lights = grid(1000);
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function out() {
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return '\t' + Object.values(lights).join().replace(/true/g, '*').replace(/false/g, '_').replace(/,/g, '\t');
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};
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console.time('speed');
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let counter = 0;
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fs.readFileSync('input.txt', 'utf-8').split('\n').forEach(line => {
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[, state, x1, y1, x2, y2] = line.match(/(toggle|off|on) (\d+),(\d+) \w+ (\d+),(\d+)/);
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[x1, y1, x2, y2] = [x1, y1, x2, y2].map(Number);
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func = state == 'toggle' ? (v => !v) : state == 'on' ? (v => true) : (v => false);
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for (let y = y1; y <= y2; y++) {
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for (let x = x1; x <= x2; x++) {
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let b = lights[`${x},${y}`]
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let a = func(lights[`${x},${y}`])
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counter += !b && a ? 1 : b && !a ? -1 : 0;
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lights[`${x},${y}`] = a;
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}
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}
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});
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console.log(counter);
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console.timeEnd('speed');
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