From 0827c0f9ca1973226fccc28833fc62a09afb5f9f Mon Sep 17 00:00:00 2001
From: Jeff Yates <jeff@thinkpad.lab.doublehack.me>
Date: Sun, 6 Dec 2020 07:13:02 -0500
Subject: [PATCH] finished solution

---
 day05/solution01.rb | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100755 day05/solution01.rb

diff --git a/day05/solution01.rb b/day05/solution01.rb
new file mode 100755
index 0000000..a8c706f
--- /dev/null
+++ b/day05/solution01.rb
@@ -0,0 +1,34 @@
+#!/bin/env ruby
+
+ids = []
+File.readlines('./input').each do |line|
+    line.strip!
+    row = [0, 127]
+    col = [0, 7]
+    step = 64
+    line[..6].each_char do |char|
+        row[0] += step if char == 'B'
+        row[1] -= step if char == 'F'
+        step /= 2
+    end
+    step = 4
+    line[-3..].each_char do |char|
+        col[0] += step if char == 'R'
+        col[1] -= step if char == 'L'
+        step /= 2
+    end
+    id = (row[0] * 8) + col[0]
+    ids.push(id)
+    puts "Seat #{line} is at row #{row} and column #{col}. Seat id: #{id}"
+end
+
+puts "The highest seat ID is #{ids.max}"
+ids.sort!
+ids.each_index do |i|
+    next if i == 0
+    if ids[i] != (ids[i-1] + 1)
+        puts "My seat is #{ids[i] - 1}"
+        break
+    end
+end
+    
\ No newline at end of file