2018 d3 all by myself

2018/3/part1.js

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+const fs = require('fs');
+
+let input = fs.readFileSync('input.txt', 'utf-8');
+let grid = {};
+
+for (const line of input.split('\n')) {
+	[rule,
+		id,
+		left,
+		top,
+		width,
+		height] = line.match(/#(\d+) @ (\d+),(\d+): (\d+)x(\d+)/).map(Number);
+	for (let x = left; x < left + width; x++) {
+		for (let y = top; y < top + height; y++) {
+			grid[`${x},${y}`] = (grid[`${x},${y}`] || 0) + 1;
+		}
+	}
+}
+
+console.log(Object.values(grid).filter(v => v > 1).length);

2018/3/part2.js

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+const fs = require('fs');
+
+let input = fs.readFileSync('input.txt', 'utf-8');
+let grid = {};
+let claims = []
+
+for (let line of input.split('\n')) {
+	[rule,
+		id,
+		left,
+		top,
+		width,
+		height] = line.match(/#(\d+) @ (\d+),(\d+): (\d+)x(\d+)/).map(Number);
+	claims[id] = true;
+	for (let x = left; x < left + width; x++) {
+		for (let y = top; y < top + height; y++) {
+			if (grid[`${x},${y}`]) {
+				claims[grid[`${x},${y}`]] = false;
+				claims[id] = false;
+			}
+			grid[`${x},${y}`] = id;
+		}
+	}
+}
+console.log(Object.entries(claims).filter(v => v[1])[0][0]);