Initial Commit

Signed-off-by: Avior <github@avior.me>

d3/ex.txt

@@ -0,0 +1,12 @@
+00100
+11110
+10110
+10111
+10101
+01111
+00111
+11100
+10000
+11001
+00010
+01010

d3/part1.ts

@@ -0,0 +1,27 @@
+import fs from 'fs'
+
+const input = fs.readFileSync(__dirname + '/input.txt').toString()
+	.split('\n')
+
+const list: Array<{0: number, 1: number}> = []
+for (const line of input) {
+	const splitted = line.split('')
+	for (let i = 0; i < splitted.length; i++) {
+		const bit = splitted[i];
+		if (!list[i]) {
+			list[i] = {0: 0, 1: 0}
+		}
+		list[i][bit === '0' ? 0 : 1]++
+	}
+}
+
+let gamma = ''
+let epsilon = ''
+for (const item of list) {
+	gamma = gamma + ((item[0] > item[1]) ? '0' : '1')
+	epsilon = epsilon + ((item[0] < item[1]) ? '0' : '1')
+}
+
+console.log(list)
+
+console.log(`Result: ${parseInt(gamma, 2) * parseInt(epsilon, 2)}`)

d3/part2.ts

@@ -0,0 +1,38 @@
+import fs from 'fs'
+
+const input = fs.readFileSync(__dirname + '/input.txt').toString()
+	.split('\n')
+
+
+	
+function find(mostUsed = true) {
+	let list = input
+	for (let i = 0; i < list[0].length; i++) {
+		const counts = {'0': 0, '1': 0}
+		for (const line of list) {
+			const bit = line[i] as '0' | '1'
+			counts[bit]++
+		}
+	
+		const comparator = counts['0'] > counts['1'] ? '0' : '1' 
+		let fn: (item: string) => boolean
+		if (mostUsed) {
+			fn = (line) => line[i] === comparator
+		} else {
+			fn = (line) => line[i] !== comparator
+		}
+		
+		list = list.filter(fn)
+	
+		if (list.length === 1) {
+			break
+		}
+	}
+
+	return list[0]
+}
+const resORG = find()
+console.log(`ORG: ${resORG} or ${parseInt(resORG, 2)}`)
+const resCSR = find(false)
+console.log(`CSR: ${resCSR} or ${parseInt(resCSR, 2)}`)
+console.log(`Result: ${parseInt(resORG, 2) * parseInt(resCSR, 2)}`)