From 72ca03a2f13770f0c02d60115ef493609ebb2ba7 Mon Sep 17 00:00:00 2001
From: Avior <github@avior.me>
Date: Sun, 3 Dec 2023 23:31:52 +0100
Subject: [PATCH] feat: Add the four first days of 2023

Signed-off-by: Avior <github@avior.me>
---
 2023/day-1/input.txt | 1000 ++++++++++++++++++++++++++++++++++++++++++
 2023/day-1/part-1.ts |   10 +
 2023/day-1/part-2.ts |   43 ++
 2023/day-2/input.txt |  100 +++++
 2023/day-2/part-1.ts |   38 ++
 2023/day-2/part-2.ts |   46 ++
 2023/day-3/input.txt |  140 ++++++
 2023/day-3/part-1.ts |   72 +++
 2023/day-3/part-2.ts |   83 ++++
 9 files changed, 1532 insertions(+)
 create mode 100644 2023/day-1/input.txt
 create mode 100644 2023/day-1/part-1.ts
 create mode 100644 2023/day-1/part-2.ts
 create mode 100644 2023/day-2/input.txt
 create mode 100644 2023/day-2/part-1.ts
 create mode 100644 2023/day-2/part-2.ts
 create mode 100644 2023/day-3/input.txt
 create mode 100644 2023/day-3/part-1.ts
 create mode 100644 2023/day-3/part-2.ts

diff --git a/2023/day-1/input.txt b/2023/day-1/input.txt
new file mode 100644
index 0000000..8e8cb86
--- /dev/null
+++ b/2023/day-1/input.txt
@@ -0,0 +1,1000 @@
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\ No newline at end of file
diff --git a/2023/day-1/part-1.ts b/2023/day-1/part-1.ts
new file mode 100644
index 0000000..5e0f54c
--- /dev/null
+++ b/2023/day-1/part-1.ts
@@ -0,0 +1,10 @@
+// note: this runs using bun!
+const file = Bun.file('./input.txt')
+const text = await file.text()
+const res = text.split('\n').filter((it) => !!it).map((it) => {
+	const nums = it.replace(/[a-z]/g, '')
+	const first = nums[0]
+	const last = nums[nums.length - 1]
+	return parseInt(first + last)
+}).reduce((p, c) => p + c, 0)
+console.log(res)
diff --git a/2023/day-1/part-2.ts b/2023/day-1/part-2.ts
new file mode 100644
index 0000000..e24d379
--- /dev/null
+++ b/2023/day-1/part-2.ts
@@ -0,0 +1,43 @@
+// note: this runs using bun!
+const file = Bun.file('./input.txt')
+const text = await file.text()
+
+// hack by https://twitter.com/championswimmer/status/1730667285415948767
+const letters = {
+	'one': 'o1ne',
+	'two': 't2wo',
+	'three': 'th3ree',
+	'four': 'fo4ur',
+	'five': 'fi5ve',
+	'six': 's6ix',
+	'seven': 'se7ven',
+	'eight': 'ei8ght',
+	'nine': 'ni9ne'
+} as const
+
+const res = text.split('\n').filter((it) => !!it).map((it) => {
+	let nextNumber = -1
+	let nextLetter: keyof typeof letters | null = null
+	do {
+		nextNumber = -1
+		for (const text in letters) {
+			const idx = it.indexOf(text)
+			if (nextNumber === -1 || (idx > -1 && idx < nextNumber)) {
+				nextNumber = idx
+				nextLetter = text as 'one'
+			}
+		}
+		if (nextNumber > -1 && nextLetter) {
+			it = it.replace(nextLetter, letters[nextLetter])
+		}
+	} while (nextNumber > -1)
+	
+	const nums = it.replace(/[a-z]/g, '')
+	const first = nums[0]
+	const last = nums[nums.length - 1]
+	return parseInt(first + last)
+}).reduce((p, c) => p + c, 0)
+console.log(res)
+
+// too low:
+// too high: 53896
\ No newline at end of file
diff --git a/2023/day-2/input.txt b/2023/day-2/input.txt
new file mode 100644
index 0000000..34a6672
--- /dev/null
+++ b/2023/day-2/input.txt
@@ -0,0 +1,100 @@
+Game 1: 1 green, 4 blue; 1 blue, 2 green, 1 red; 1 red, 1 green, 2 blue; 1 green, 1 red; 1 green; 1 green, 1 blue, 1 red
+Game 2: 2 blue, 2 red, 6 green; 1 red, 6 green, 7 blue; 10 green, 8 blue, 1 red; 2 green, 18 blue, 2 red; 14 blue, 3 green, 1 red; 8 green, 1 red, 9 blue
+Game 3: 6 green, 5 blue, 9 red; 4 blue, 1 green, 13 red; 9 green, 14 red, 1 blue
+Game 4: 14 green, 3 blue, 16 red; 20 red; 4 green, 2 red, 1 blue; 10 blue, 11 green, 18 red; 3 red, 3 blue, 6 green; 2 green, 18 red, 9 blue
+Game 5: 5 green, 4 blue; 1 red, 3 blue, 2 green; 4 green, 2 red, 15 blue; 11 blue, 8 green, 4 red; 4 red, 3 green; 4 red, 3 green, 7 blue
+Game 6: 6 blue, 10 green; 2 red, 6 green, 2 blue; 4 red, 4 blue, 1 green; 2 blue, 7 green, 2 red
+Game 7: 14 green, 3 red, 2 blue; 5 blue, 3 green, 2 red; 1 green, 3 blue
+Game 8: 7 red; 3 blue, 9 red, 1 green; 5 green, 5 blue, 7 red; 1 red, 2 blue
+Game 9: 3 green, 4 blue, 1 red; 3 blue, 12 green, 18 red; 7 green, 9 red, 8 blue; 2 blue, 10 red, 12 green; 4 blue, 1 red, 1 green; 4 blue, 6 green, 6 red
+Game 10: 2 blue, 4 green, 2 red; 7 green, 4 red; 5 red, 8 green
+Game 11: 1 blue, 10 green, 15 red; 1 blue, 2 green, 2 red; 5 green, 10 blue, 8 red; 13 red, 7 blue; 1 red, 9 green, 4 blue; 9 blue, 9 red, 8 green
+Game 12: 1 green, 10 red, 3 blue; 14 red, 1 green, 4 blue; 6 red, 3 green, 12 blue; 13 blue, 1 green, 18 red; 4 green, 14 red, 7 blue
+Game 13: 1 red, 3 green; 2 green, 1 red, 5 blue; 1 blue; 1 green, 7 blue, 1 red; 1 red, 2 green, 7 blue
+Game 14: 7 blue, 9 red, 1 green; 8 red, 2 blue; 11 red, 18 blue, 4 green; 2 blue, 3 green, 1 red; 1 green, 8 red, 9 blue; 2 blue, 8 red, 1 green
+Game 15: 8 blue, 3 green, 15 red; 13 red, 10 blue; 2 red
+Game 16: 1 green, 1 red; 1 blue, 2 green, 2 red; 1 blue, 4 red, 1 green; 3 green; 2 blue, 3 green, 4 red
+Game 17: 1 green, 3 red, 14 blue; 1 red, 2 blue, 2 green; 3 red
+Game 18: 1 red, 2 green, 8 blue; 2 blue, 14 red; 4 blue, 2 red, 2 green; 6 red
+Game 19: 2 red, 11 blue, 18 green; 3 red, 6 green, 3 blue; 7 green, 1 red, 10 blue
+Game 20: 10 red, 1 blue, 4 green; 4 green, 3 blue; 10 green, 13 red, 4 blue; 2 red, 7 green; 4 red, 3 blue, 5 green; 13 red, 1 green, 4 blue
+Game 21: 20 red, 4 green, 5 blue; 10 red, 11 green, 4 blue; 1 red, 8 blue, 14 green; 11 green, 8 blue, 15 red; 8 blue, 2 green, 13 red
+Game 22: 2 red, 11 blue, 4 green; 1 blue, 3 red, 6 green; 6 green, 1 red, 1 blue; 4 green, 7 blue, 3 red; 11 blue, 6 green, 4 red
+Game 23: 6 green, 3 red, 1 blue; 17 green, 11 red; 1 red, 2 blue, 13 green; 13 green, 19 red
+Game 24: 1 blue; 12 red, 1 blue; 1 red; 12 red, 1 green, 1 blue; 11 red, 1 blue; 12 red, 1 green
+Game 25: 12 blue, 6 red, 3 green; 8 green, 14 blue; 11 green, 5 blue, 6 red; 4 red, 12 blue, 8 green
+Game 26: 15 red, 13 green, 9 blue; 9 blue, 8 green, 7 red; 2 green, 6 red, 3 blue; 1 blue, 7 red, 3 green; 13 blue, 4 green, 18 red
+Game 27: 9 blue, 5 red; 15 red, 12 blue, 3 green; 12 red, 12 blue, 1 green
+Game 28: 18 red, 4 green; 4 green, 6 red; 1 blue, 6 green, 19 red; 9 green, 17 red; 4 green, 5 blue, 18 red
+Game 29: 7 green, 6 red, 6 blue; 6 blue, 19 red, 4 green; 4 green, 4 blue, 13 red; 5 blue, 15 red, 10 green; 2 green, 6 blue, 5 red; 8 red, 10 green, 6 blue
+Game 30: 1 green, 13 red, 12 blue; 1 red, 2 blue; 11 blue, 1 red, 1 green
+Game 31: 8 green, 18 blue, 17 red; 4 red, 8 green, 6 blue; 9 blue, 7 green; 3 green, 1 blue, 12 red; 5 red, 10 blue, 11 green
+Game 32: 17 red, 17 green, 7 blue; 18 red, 16 green; 1 blue
+Game 33: 16 blue, 3 red; 9 blue, 1 red, 2 green; 3 green, 7 blue; 1 green, 4 red; 3 green, 1 red, 8 blue; 5 blue
+Game 34: 5 blue, 8 red, 1 green; 9 red, 10 blue, 7 green; 1 green, 14 blue; 8 blue, 4 red, 10 green; 15 blue, 8 green, 7 red; 2 red, 6 green, 3 blue
+Game 35: 13 red, 9 blue; 7 blue, 16 red, 10 green; 4 red, 6 blue; 3 blue, 12 green, 7 red; 8 blue, 6 red; 10 blue, 3 green, 2 red
+Game 36: 1 blue, 9 red, 2 green; 11 red, 3 blue, 2 green; 2 green, 6 red; 8 green, 11 red, 3 blue; 4 green, 7 blue, 11 red; 9 green, 8 red, 2 blue
+Game 37: 8 green, 3 blue, 4 red; 14 blue, 10 green, 3 red; 19 green, 2 blue, 7 red
+Game 38: 2 green, 3 red, 3 blue; 3 green, 9 red; 13 blue, 8 red; 6 red, 5 green, 13 blue
+Game 39: 8 red, 5 blue; 4 green, 5 blue, 3 red; 18 red, 2 green, 6 blue; 2 green, 5 blue, 17 red; 1 green, 2 red; 5 green, 6 blue
+Game 40: 12 red, 4 blue, 1 green; 11 green, 20 blue, 4 red; 10 blue, 4 red
+Game 41: 2 green, 2 blue; 2 red, 2 green; 2 green, 2 blue, 10 red
+Game 42: 6 green, 3 blue; 2 red, 2 green, 1 blue; 3 blue, 5 green, 6 red; 6 red; 1 blue, 6 green, 12 red
+Game 43: 1 blue, 4 green; 1 blue; 2 blue, 8 red, 2 green; 2 blue, 1 red, 4 green; 1 blue, 4 red, 4 green; 4 green, 7 red
+Game 44: 8 green, 9 red; 1 red, 2 blue, 13 green; 4 blue, 8 green, 17 red; 13 red, 13 green; 1 red, 9 green; 19 red, 3 green, 3 blue
+Game 45: 10 blue, 2 red, 1 green; 6 green, 5 red, 8 blue; 3 blue, 1 red; 4 green, 10 blue, 4 red
+Game 46: 3 red, 8 blue; 6 blue, 7 green, 6 red; 6 green, 1 blue, 7 red; 8 red, 1 green, 5 blue; 9 red, 12 blue, 10 green; 7 green, 5 red, 1 blue
+Game 47: 5 red; 2 blue, 2 green, 5 red; 3 green, 7 red; 14 red, 3 green, 2 blue
+Game 48: 7 blue, 12 green, 2 red; 11 green, 10 blue, 1 red; 1 red, 13 blue, 2 green; 14 green, 2 red, 9 blue; 2 red, 12 green, 3 blue; 2 red, 7 blue
+Game 49: 4 green, 5 blue; 9 blue; 10 blue, 5 green, 2 red; 10 blue, 2 red, 2 green; 1 red, 1 green, 4 blue; 2 blue
+Game 50: 2 red, 2 blue, 7 green; 7 red, 9 green, 3 blue; 5 red, 10 green
+Game 51: 15 red, 9 blue, 4 green; 5 red, 2 blue, 15 green; 4 blue, 3 green, 20 red; 12 green, 1 red, 10 blue; 10 green, 5 blue, 13 red; 9 red, 10 green, 11 blue
+Game 52: 3 blue, 12 green, 1 red; 6 green; 1 red, 8 green; 1 blue, 1 green, 1 red
+Game 53: 10 green, 7 red, 12 blue; 9 blue, 6 green, 2 red; 8 green, 5 blue, 5 red; 7 blue, 16 green, 11 red; 6 red, 8 blue, 13 green
+Game 54: 10 green, 6 blue, 3 red; 6 green, 2 red, 8 blue; 9 blue, 11 green, 2 red; 10 green, 1 blue, 3 red
+Game 55: 4 blue, 1 red; 3 red, 7 blue; 12 red, 4 green, 8 blue; 3 green, 5 blue, 1 red; 13 blue, 12 red, 1 green
+Game 56: 12 blue, 15 green; 1 green, 7 red, 11 blue; 5 green, 9 blue, 1 red; 8 red, 5 green, 6 blue
+Game 57: 4 green, 11 blue, 18 red; 14 blue, 14 red, 16 green; 7 red, 15 green, 3 blue; 18 red, 20 green, 8 blue; 12 blue, 9 red, 16 green
+Game 58: 10 blue, 9 green, 8 red; 13 green, 6 blue, 8 red; 8 green, 4 red; 4 blue, 1 red, 18 green; 7 red, 10 green, 10 blue; 15 blue, 10 green, 3 red
+Game 59: 17 green, 2 blue, 2 red; 2 blue, 1 red, 8 green; 14 green, 1 red, 1 blue; 15 green, 3 blue, 2 red; 2 blue, 8 green, 1 red; 1 blue, 1 red, 8 green
+Game 60: 1 green, 1 blue, 1 red; 4 blue, 3 red, 2 green; 13 green; 2 blue, 2 red, 8 green; 4 red, 12 green, 4 blue; 4 green, 4 blue, 4 red
+Game 61: 3 blue, 7 red; 5 blue, 8 red, 1 green; 1 blue, 8 red; 10 blue, 2 red, 1 green; 1 green, 5 blue, 2 red
+Game 62: 10 red, 2 green; 8 blue, 7 red, 2 green; 4 green, 2 blue, 10 red
+Game 63: 1 green, 3 blue, 5 red; 6 green, 5 blue, 2 red; 3 blue, 7 red
+Game 64: 6 red, 20 blue; 4 red, 3 blue, 2 green; 3 green, 19 blue, 6 red; 2 green, 6 blue, 3 red; 13 blue, 5 green, 5 red
+Game 65: 6 red, 9 blue, 20 green; 6 red, 16 green, 4 blue; 12 red, 6 green, 5 blue
+Game 66: 2 blue, 5 red, 4 green; 13 blue, 2 green; 1 green, 6 blue
+Game 67: 4 green, 5 blue, 2 red; 1 red, 14 blue, 6 green; 1 green, 14 red, 5 blue; 18 red, 16 blue; 15 blue, 8 red, 18 green; 1 green, 18 red, 6 blue
+Game 68: 1 blue, 9 red, 7 green; 7 red, 1 blue, 6 green; 5 green, 1 blue, 8 red
+Game 69: 12 green, 3 blue, 4 red; 9 green, 8 red, 7 blue; 4 blue, 5 red, 10 green; 4 red, 5 green, 7 blue; 9 green, 4 red, 2 blue; 3 green, 13 blue, 1 red
+Game 70: 9 red, 1 green, 8 blue; 11 green, 13 blue, 12 red; 3 blue, 5 green, 8 red; 1 red, 14 blue
+Game 71: 10 blue; 2 green, 8 blue, 9 red; 5 red, 1 blue
+Game 72: 3 green, 5 blue, 5 red; 1 blue, 1 red, 2 green; 4 red, 4 blue, 1 green; 5 blue, 4 red, 1 green; 6 blue, 3 green, 5 red; 5 blue, 1 red, 4 green
+Game 73: 3 red, 1 green, 1 blue; 7 green, 2 red, 1 blue; 2 green, 1 blue, 3 red; 1 red, 4 green, 1 blue; 3 red, 5 green
+Game 74: 5 blue, 1 red, 4 green; 3 red, 2 green; 4 red, 6 blue; 2 red, 2 blue; 1 green, 4 red, 8 blue; 5 blue, 4 red
+Game 75: 3 red, 5 blue, 3 green; 9 green, 6 blue, 7 red; 2 green, 3 red, 12 blue; 14 green, 4 blue, 10 red
+Game 76: 1 blue, 7 red, 1 green; 6 red, 1 blue, 2 green; 4 red, 2 green; 3 red, 1 blue; 16 red, 1 green
+Game 77: 3 red, 10 blue, 1 green; 4 red, 7 blue, 3 green; 7 blue, 6 green, 7 red; 5 green, 15 blue, 7 red; 12 green, 5 red
+Game 78: 6 red, 10 blue, 15 green; 6 green, 11 red, 4 blue; 6 blue, 8 red; 4 blue, 7 red, 2 green; 11 green, 7 red, 11 blue; 3 blue, 14 green, 6 red
+Game 79: 14 red, 6 green, 4 blue; 13 red, 6 blue; 6 red, 13 green, 4 blue
+Game 80: 8 red, 2 blue, 8 green; 6 red, 10 green, 4 blue; 3 red, 9 green; 2 green, 8 blue, 7 red; 7 blue, 3 red, 11 green; 1 red, 12 green, 8 blue
+Game 81: 9 red, 4 blue, 11 green; 1 blue, 4 red, 2 green; 5 red; 3 blue, 2 red, 2 green; 14 red, 12 green
+Game 82: 5 green; 2 blue; 2 red; 1 blue, 2 red, 11 green; 8 green, 2 red, 1 blue
+Game 83: 3 green, 7 red, 6 blue; 7 red, 7 green, 11 blue; 7 blue, 13 green, 7 red; 12 blue, 10 red, 2 green; 1 green, 11 red, 7 blue; 12 blue, 9 red, 9 green
+Game 84: 5 blue, 1 green; 16 green, 4 blue, 8 red; 7 red, 5 blue, 16 green
+Game 85: 9 green, 20 blue, 7 red; 19 blue, 14 red, 2 green; 10 green, 2 red, 10 blue
+Game 86: 1 green, 3 red, 5 blue; 9 red, 2 blue, 6 green; 8 green, 14 red, 3 blue; 18 green, 2 blue, 7 red; 2 blue, 10 red, 14 green; 17 green, 4 blue, 12 red
+Game 87: 4 green, 8 red, 13 blue; 7 red, 13 blue, 4 green; 1 green, 8 blue
+Game 88: 9 blue, 11 red; 5 green, 7 blue, 12 red; 10 red, 2 green, 1 blue; 2 blue, 5 red, 5 green; 7 red, 6 green, 9 blue; 1 green, 10 red, 5 blue
+Game 89: 7 red, 2 green, 1 blue; 1 blue, 2 green; 6 red, 1 green; 7 red, 1 blue; 3 green, 3 red
+Game 90: 8 blue, 2 red, 3 green; 9 green, 4 blue, 3 red; 7 green, 11 blue, 2 red; 13 green, 12 blue, 8 red; 10 blue, 2 green; 5 green, 1 red, 9 blue
+Game 91: 2 red, 2 green, 4 blue; 5 blue, 2 red, 16 green; 11 green; 3 blue, 2 red, 8 green; 4 green, 3 blue
+Game 92: 8 red, 12 blue, 3 green; 11 red, 10 blue, 6 green; 14 red, 8 green, 14 blue
+Game 93: 3 green, 2 red, 3 blue; 3 green, 3 red, 1 blue; 2 blue, 16 red, 3 green; 2 green; 5 green, 2 blue, 2 red
+Game 94: 5 red, 2 green; 9 red, 3 blue; 2 green, 2 blue, 5 red; 3 blue, 8 red, 2 green; 8 red, 1 blue, 1 green
+Game 95: 3 blue, 4 green, 7 red; 7 red, 1 green, 15 blue; 6 blue, 2 green, 7 red
+Game 96: 2 blue, 1 red, 6 green; 7 blue, 8 green; 1 red, 7 green; 2 green, 14 blue, 1 red; 3 blue, 1 red, 7 green; 4 blue, 11 green
+Game 97: 2 red, 9 blue, 8 green; 3 green, 5 blue; 6 green, 1 red, 9 blue; 2 red, 13 green, 1 blue; 2 green, 2 red, 2 blue
+Game 98: 2 blue, 1 green, 1 red; 4 blue, 5 red, 1 green; 4 blue, 3 red, 2 green
+Game 99: 17 red, 2 blue, 4 green; 4 green, 8 red, 6 blue; 5 red
+Game 100: 6 red, 4 green; 3 red, 2 blue, 9 green; 1 blue, 5 green, 14 red; 1 blue, 2 red, 2 green; 9 red, 1 blue, 14 green; 2 blue, 11 green, 8 red
\ No newline at end of file
diff --git a/2023/day-2/part-1.ts b/2023/day-2/part-1.ts
new file mode 100644
index 0000000..388da7b
--- /dev/null
+++ b/2023/day-2/part-1.ts
@@ -0,0 +1,38 @@
+// note: this runs using bun!
+const file = Bun.file('./input.txt')
+const text = await file.text()
+
+const maxs = {
+	'red': 12,
+	'green': 13,
+	'blue': 14,
+} as const
+
+const res = text.split('\n').map((it) => {
+	const [gameId, data] = it.split(':', 2)
+	const id = gameId.split(' ')[1]
+	return {
+		id: parseInt(id),
+		reveals: data.trim().split(';').map((game) => {
+			return game
+				.trim()
+				.split(',')
+				.map((balls) => {
+					const r = balls
+						.trim()
+						.split(' ')
+					return {cubes: parseInt(r[0]), color: r[1]}
+				})
+		})
+	}
+}).filter((game) => {
+	return !game.reveals.find((reveal) => {
+		for (const color in maxs) {
+			const max = maxs[color as 'red']
+			if (reveal.find((v) => v.color === color && v.cubes > max)) {
+				return true
+			}
+		}
+	})
+}).reduce((p, c) => p + c.id, 0)
+console.log(res)
diff --git a/2023/day-2/part-2.ts b/2023/day-2/part-2.ts
new file mode 100644
index 0000000..c00729a
--- /dev/null
+++ b/2023/day-2/part-2.ts
@@ -0,0 +1,46 @@
+// note: this runs using bun!
+const file = Bun.file('./input.txt')
+const text = await file.text()
+
+type Colors = 'red' | 'green' | 'blue'
+
+const res = text.split('\n').map((it) => {
+	const [gameId, data] = it.split(':', 2)
+	const id = gameId.split(' ')[1]
+	return {
+		id: parseInt(id),
+		reveals: data.trim().split(';').map((game) => {
+			const res = game
+				.trim()
+				.split(',')
+				.map((balls) => {
+					const r = balls
+						.trim()
+						.split(' ')
+					return {cubes: parseInt(r[0]), color: r[1]}
+				})
+			return {
+				red: res.find((it) => it.color === 'red')?.cubes ?? 0,
+				green: res.find((it) => it.color === 'green')?.cubes ?? 0,
+				blue: res.find((it) => it.color === 'blue')?.cubes ?? 0,
+			}
+		})
+	}
+}).map((game) => {
+	let lowests: Record<Colors, number> = {
+		red: 0,
+		blue: 0,
+		green: 0
+	}
+	for (const reveal of game.reveals) {
+		for (const color of Object.keys(lowests) as Array<Colors>) {
+			const lowest = lowests[color]
+			if (reveal[color] > lowest) {
+				lowests[color] = reveal[color]
+			}
+		}
+	}
+	return lowests
+}).reduce((p, c) => p + c.blue * c.green * c.red, 0)
+
+console.log(res)
\ No newline at end of file
diff --git a/2023/day-3/input.txt b/2023/day-3/input.txt
new file mode 100644
index 0000000..e512137
--- /dev/null
+++ b/2023/day-3/input.txt
@@ -0,0 +1,140 @@
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+.....................*...87.........................................................447........@............*................-......*...117.
+......205.593........298..................................622....955.......34*325......*....965...................604......729....509.......
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+.370....143....*.........*.........*......*.....962...........*.....*....................537........%...........&136........................
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+.....*.................................622..........289..599....207...*............&953.599=...............885............682.....914.....12
+793...754.............$497..............*............*................163....................+.........15.....*..*....338*..................
+...*.......864................348..........758.......439...................1........83....748...............325.535...................=.....
+...368....*........382*250....*.....317.......*................473*....877.+.........*..................@................%....331..513......
+.........55..239...........2...377...=......1.792...294*607........831..........*.950...&....-....#....864.....139.......512................
+....427.......*...*...#....%...........765...............................418.995.........6..492.465...........@....................*218.....
+......*......939.410.371......#...-......#.................&............*.............................496..........503..........629.........
+.....410....................215.193.................678.786.....370...71..598......329..........262.................*.......473.............
+.........979..855..432=................212.....346..*....................*........*............#...................249...=.....+...525.217..
+.........*....*...............387.....*...........*.228......./....%....245..&.....690.....429............................685.........*.....
+129....907.423........949.772......666....173..679........992.313...398......427..............*...................244.......................
+.........................*.....*............................*........................../....998..........510..825*..........................
+.....132....867........%.....42.780..............776*744...898.......664....196....360..823......899.211..=.................+...............
+.....*.......%......703................916...%...............................*....*................*....&.....689..$......591.......64*238..
+...684..160.......................445.....*...164.......602....249...........431.12.............=..758............138..........983..........
+..........@..766.92..............*......334........671..*...............&646..................797.............950.........935.........469...
+................*..................510..............*..285..........................................650.......*....807...*............#.....
+..205.669...768...88........................+59..148............682........#.................3..............376...*.......191...............
+.........&....*..%........................................183......*......61................/........657..........163............255........
+..674.......46..............392..251....507.................*.248...74..........+...775.97.....222.........%..........135...950.....*.......
+....*...........*967..533...*............*......949..245.276...#.........*.....728...................677..137.....*.....*..&........522.....
+...367.......196.......$..239..........510.748..*............/...481..722....................800........*........735..268...................
+.........442...................111...............752........567...*.........*..........696..%............790................................
+.............182....677..613............................/..........814...372.86........*......915*..............799.................*....253
+....&....739*........../....*206.........284...........584...427................727..485..........781.992.........-...............619.......
+.....603.........................907........*....607......../.............................617............*...=.......986-.............918...
+.........819..667..341...........*....#..397................................#........$..................822...20...........359.....43.......
+.......&....*...#....*.......*....88.691.........................700.675....910...227........350...&591............301.......$.......*......
+..404$..259.......557....876.218...........216.=211.7...=569........*........................=.................320..*....462...480....747...
+..........................+.............#..*........*.................=518........................274............@...276........../.........
+.......#...904......622..............923....543....969../..................571..778......#888.253..................+.....163.........-679...
+295.207.........708......................................942...496....#...*.......*.373@.......*..645...............580.......177...........
+................................982*317............304........*.......28.823....994.......370..96........@.=...*675............*.....604....
+644.138.522......%......901.................374*..*.........458.....................#135....=..........730.355........955...=.47.277*.......
+...*....*.........288..*.............+.433.........240.................317/........................609............#90.*...623...............
+.....%..675....87.......110...126.408..*......355.............................@131......110....778...*..519.834.......537.....19........502.
+..831............*460........*..........824.....*..751...467.829..........850..........*............365....*................................
+..........398..............473....-..........751.....*......*................@.446*....780...........................732....................
+.......................#.........333..................170........596...............943......66..186......@...........@.....=................
+......124....780.....58.....933........926.../.............693...*..........*828...............*........666.............=..337..............
+.......*.........197..........$.......*......67............-...335...........................122...582................197..........328......
+.....151...............................763......180....@............890../....835...578..871..........*295..#....%...........-541.$.........
+........................153.........-........@.....*...661..*833......*.775.....-...........................40....665...............701.....
+..890....252......................544........809..425..............925......................................................................
\ No newline at end of file
diff --git a/2023/day-3/part-1.ts b/2023/day-3/part-1.ts
new file mode 100644
index 0000000..f7a63f0
--- /dev/null
+++ b/2023/day-3/part-1.ts
@@ -0,0 +1,72 @@
+// note: this runs using bun!
+const file = Bun.file('./input.txt')
+const text = await file.text()
+
+const rowLength = text.indexOf('\n')
+const rows = text.split('\n')// .slice(1, 3)
+const rowCount = rows.length
+const matrix = rows.map((it) => it.split(''))
+const numbers = '0123456789'
+
+function cellHasSymbol(rowIdx: number, colIdx: number) {
+	const char = matrix[rowIdx][colIdx]
+	return char !== '.' && !numbers.includes(char)
+}
+
+function numberHasSymbol(rowIdx: number, colIdxStart: number, colIdxEnd: number) {
+	console.log(rowIdx, colIdxStart, colIdxEnd)
+	const min = Math.max(0, colIdxStart - 1)
+	const max = Math.min(rowLength, colIdxEnd + 2)
+	for (let colIdx = min; colIdx < max; colIdx++) {
+		if (rowIdx > 0) {
+			console.log(cellHasSymbol(rowIdx - 1, colIdx), rowIdx - 1, colIdx)
+			if (cellHasSymbol(rowIdx - 1, colIdx)) {
+				return true
+			}
+		}
+		console.log(cellHasSymbol(rowIdx, colIdx), rowIdx, colIdx)
+		if (cellHasSymbol(rowIdx, colIdx)) {
+			return true
+		}
+		if (rowIdx < rowCount - 1) {
+			console.log(cellHasSymbol(rowIdx + 1, colIdx), rowIdx + 1, colIdx)
+			if (cellHasSymbol(rowIdx + 1, colIdx)) {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+let numbersWithPart: Array<number> = []
+for (let rowIdx = 0; rowIdx < matrix.length; rowIdx++) {
+	const row = matrix[rowIdx]
+	let startIdx = -1
+	let num = ''
+	for (let colIdx = 0; colIdx < row.length; colIdx++) {
+		const col = row[colIdx]
+		if (numbers.includes(col) && startIdx === -1) {
+			startIdx = colIdx
+			num += col
+		} else if (numbers.includes(col)) {
+			num += col
+		} else if (!numbers.includes(col) && startIdx > -1) {
+			console.log(num)
+			if (numberHasSymbol(rowIdx, startIdx, colIdx - 1)) {
+				numbersWithPart.push(parseInt(num))
+			}
+			startIdx = -1
+			num = ''
+		}
+	}
+	if (startIdx > -1) {
+		if (numberHasSymbol(rowIdx, startIdx, row.length - 1)) {
+			console.log(num)
+			numbersWithPart.push(parseInt(num))
+		}
+	}
+}
+console.log(numbersWithPart, numbersWithPart.reduce((p, c) => p + c, 0))
+
+// too low: 514045
+// too high: 516111
\ No newline at end of file
diff --git a/2023/day-3/part-2.ts b/2023/day-3/part-2.ts
new file mode 100644
index 0000000..cbc23f9
--- /dev/null
+++ b/2023/day-3/part-2.ts
@@ -0,0 +1,83 @@
+// note: this runs using bun!
+const file = Bun.file('./input.txt')
+const text = await file.text()
+
+const rowLength = text.indexOf('\n')
+const rows = text.split('\n')// .slice(1, 3)
+const rowCount = rows.length
+const matrix = rows.map((it) => it.split(''))
+const numbers = '0123456789'
+
+function cellIsGear(rowIdx: number, colIdx: number) {
+	return matrix[rowIdx][colIdx] === '*'
+}
+
+function numberHasGear(rowIdx: number, colIdxStart: number, colIdxEnd: number) {
+	console.log(rowIdx, colIdxStart, colIdxEnd)
+	const min = Math.max(0, colIdxStart - 1)
+	const max = Math.min(rowLength, colIdxEnd + 2)
+	for (let colIdx = min; colIdx < max; colIdx++) {
+		if (rowIdx > 0) {
+			console.log(cellIsGear(rowIdx - 1, colIdx), rowIdx - 1, colIdx)
+			if (cellIsGear(rowIdx - 1, colIdx)) {
+				return [rowIdx - 1, colIdx]
+			}
+		}
+		console.log(cellIsGear(rowIdx, colIdx), rowIdx, colIdx)
+		if (cellIsGear(rowIdx, colIdx)) {
+			return [rowIdx, colIdx]
+		}
+		if (rowIdx < rowCount - 1) {
+			console.log(cellIsGear(rowIdx + 1, colIdx), rowIdx + 1, colIdx)
+			if (cellIsGear(rowIdx + 1, colIdx)) {
+				return [rowIdx + 1, colIdx]
+			}
+		}
+	}
+	return undefined
+}
+
+let gears: Record<`${number}-${number}`, Array<number>> = {}
+
+let numbersWithPart: Array<number> = []
+for (let rowIdx = 0; rowIdx < matrix.length; rowIdx++) {
+	const row = matrix[rowIdx]
+	let startIdx = -1
+	let num = ''
+	for (let colIdx = 0; colIdx < row.length; colIdx++) {
+		const col = row[colIdx]
+		if (numbers.includes(col) && startIdx === -1) {
+			startIdx = colIdx
+			num += col
+		} else if (numbers.includes(col)) {
+			num += col
+		} else if (!numbers.includes(col) && startIdx > -1) {
+			const gearIdx = numberHasGear(rowIdx, startIdx, colIdx - 1)
+			if (gearIdx) {
+				let gear = gears[gearIdx.join('-') as '1-1']
+				if (!gear) {
+					gear = []
+				}
+				gear.push(parseInt(num))
+				gears[gearIdx.join('-') as '1-1'] = gear
+			}
+			num = ''
+			startIdx = -1
+		}
+	}
+	if (startIdx > -1) {
+		const gearIdx = numberHasGear(rowIdx, startIdx, row.length - 1)
+		if (gearIdx) {
+			let gear = gears[gearIdx.join('-') as '1-1']
+			if (!gear) {
+				gear = []
+			}
+			gear.push(parseInt(num))
+			gears[gearIdx.join('-') as '1-1'] = gear
+		}
+	}
+}
+console.log(gears, Object.values(gears).filter((it) => it.length === 2).reduce((p, c) => p + c.reduce((pp, cc) => pp * cc, 1), 0))
+
+// too low:
+// too high:
\ No newline at end of file