From bd14f76482a93448a5abcbc84a40654bdb1c0804 Mon Sep 17 00:00:00 2001
From: cyberdick <cyberdick.wn@gmail.com>
Date: Sat, 3 Dec 2022 19:22:08 +0530
Subject: [PATCH] finish day 3

---
 AOC2022/Puzzles/Day3.cs | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/AOC2022/Puzzles/Day3.cs b/AOC2022/Puzzles/Day3.cs
index ecd327b..6a25a43 100644
--- a/AOC2022/Puzzles/Day3.cs
+++ b/AOC2022/Puzzles/Day3.cs
@@ -51,7 +51,24 @@ internal class Day3 : IPuzzle
 
 	public void SecondPuzzle()
 	{
-		throw new NotImplementedException();
+		var prioritySum = 0;
+		for (int i = 0; i < noOfRuckSacks; i += 3)
+		{
+			var elf1Sack = _linesFromFile[i].Trim();
+			var elf2Sack = _linesFromFile[i + 1].Trim();
+			var elf3Sack = _linesFromFile[i + 2].Trim();
+			char authenticItem = ' ';
+			foreach (var item in elf1Sack)
+			{
+				if (elf2Sack.Contains(item) && elf3Sack.Contains(item))
+				{
+					authenticItem = item;
+					break;
+				}
+			}
+			prioritySum += EvaluatePriority(authenticItem);
+		}
+		Console.WriteLine(prioritySum.ToString());
 	}
 
 	private static int EvaluatePriority(char ruckSackItem)