Initial Commit

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

d6/ex.txt

@@ -0,0 +1 @@
+3,4,3,1,2

d6/input.txt

@@ -0,0 +1 @@
+5,4,3,5,1,1,2,1,2,1,3,2,3,4,5,1,2,4,3,2,5,1,4,2,1,1,2,5,4,4,4,1,5,4,5,2,1,2,5,5,4,1,3,1,4,2,4,2,5,1,3,5,3,2,3,1,1,4,5,2,4,3,1,5,5,1,3,1,3,2,2,4,1,3,4,3,3,4,1,3,4,3,4,5,2,1,1,1,4,5,5,1,1,3,2,4,1,2,2,2,4,1,2,5,5,1,4,5,2,4,2,1,5,4,1,3,4,1,2,3,1,5,1,3,4,5,4,1,4,3,3,3,5,5,1,1,5,1,5,5,1,5,2,1,5,1,2,3,5,5,1,3,3,1,5,3,4,3,4,3,2,5,2,1,2,5,1,1,1,1,5,1,1,4,3,3,5,1,1,1,4,4,1,3,3,5,5,4,3,2,1,2,2,3,4,1,5,4,3,1,1,5,1,4,2,3,2,2,3,4,1,3,4,1,4,3,4,3,1,3,3,1,1,4,1,1,1,4,5,3,1,1,2,5,2,5,1,5,3,3,1,3,5,5,1,5,4,3,1,5,1,1,5,5,1,1,2,5,5,5,1,1,3,2,2,3,4,5,5,2,5,4,2,1,5,1,4,4,5,4,4,1,2,1,1,2,3,5,5,1,3,1,4,2,3,3,1,4,1,1

d6/part1.ts

@@ -0,0 +1,28 @@
+import fs from 'fs'
+
+const input = fs.readFileSync(__dirname + '/input.txt').toString()
+	.split(',').map((it) => parseInt(it))
+
+const numberOfDays = 80
+const LOG = false
+
+if (LOG) console.log("Initial state:", input)
+
+for (let i = 1; i <= numberOfDays; i++) {
+	const len = input.length
+	for (let j = 0; j < len; j++) {
+		if (input[j] === 0) {
+			input[j] = 6
+			input.push(8)
+		} else {
+			input[j]--
+		}
+	}
+
+	if (LOG) console.log("After", i, "days:", input)
+	
+}
+
+console.log(
+	"Result:", input.length
+)

d6/part2.ts

@@ -0,0 +1,43 @@
+import fs from 'fs'
+
+const input = fs.readFileSync(__dirname + '/input.txt').toString()
+	.split(',').map((it) => parseInt(it))
+
+const numberOfDays = 256
+const LOG = false
+
+
+const list: Record<number, number> = {}
+
+for (const fishy of input) {
+	if (!(fishy in list)) {
+		list[fishy] = 0
+	}
+	list[fishy]++
+}
+
+if (LOG) console.log("Initial state:", list, Object.values(list).reduce((p, c) => p + c, 0))
+
+for (let i = 1; i <= numberOfDays; i++) {
+	let newBorns = 0
+	for (let v = 0;  v <= 8; v++) {
+		if (!(v in list)) {
+			list[v] = 0
+		}
+		if (v === 0) {
+			newBorns = list[v] ?? 0
+		} else {
+			list[v - 1] = list[v]
+		}
+	}
+	list[8] = newBorns
+	list[6] = newBorns + (list[6] ?? 0)
+	
+
+	if (LOG) console.log("After", i, "days:", list, Object.values(list).reduce((p, c) => p + c, 0))
+	
+}
+
+console.log(
+	"Result:", Object.values(list).reduce((p, c) => p + c, 0)
+)