From 6fbe7871d54bd07c4a412004f52701e9e4158b2a Mon Sep 17 00:00:00 2001
From: Jake Charman <jake@jakecharman.co.uk>
Date: Mon, 4 Dec 2023 20:21:58 +0000
Subject: [PATCH] 2023 Day 4

---
 2023/Day-04/day04-1.py | 26 ++++++++++++++++++++++++++
 2023/Day-04/day04-2.py | 35 +++++++++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+)
 create mode 100755 2023/Day-04/day04-1.py
 create mode 100755 2023/Day-04/day04-2.py

diff --git a/2023/Day-04/day04-1.py b/2023/Day-04/day04-1.py
new file mode 100755
index 0000000..20822c8
--- /dev/null
+++ b/2023/Day-04/day04-1.py
@@ -0,0 +1,26 @@
+#!/usr/bin/python3
+
+def main():
+    total = 0
+
+    with open('input.txt', 'r') as input_file:
+        for line in input_file:
+            card_total = 0
+            scratchcard = line.split(':')[1]
+            winners = scratchcard.split('|')[0].strip().split(' ')
+            winners = [winner for winner in winners if winner != '']
+            my_nums = scratchcard.split('|')[1].strip().split(' ')
+            my_nums = [num for num in my_nums if num != '']
+
+            for num in my_nums:
+                if num in winners:
+                    if card_total == 0:
+                        card_total += 1
+                    elif card_total > 0:
+                        card_total = card_total * 2
+            total += card_total
+
+        print(total)
+
+if __name__ == '__main__':
+    main()
diff --git a/2023/Day-04/day04-2.py b/2023/Day-04/day04-2.py
new file mode 100755
index 0000000..52388a8
--- /dev/null
+++ b/2023/Day-04/day04-2.py
@@ -0,0 +1,35 @@
+#!/usr/bin/python3
+
+def main():
+    
+    num_cards = {}
+    card_points = {}
+    total_cards = 0
+
+    with open('input.txt', 'r') as input_file:
+        for line in input_file:
+            card_total = 0
+            scratchcard = line.split(':')[1]
+            winners = scratchcard.split('|')[0].strip().split(' ')
+            winners = [winner for winner in winners if winner != '']
+            my_nums = scratchcard.split('|')[1].strip().split(' ')
+            my_nums = [num for num in my_nums if num != '']
+
+            for num in my_nums:
+                if num in winners:
+                    card_total += 1
+            card_points[tuple(my_nums)] = card_total
+            num_cards[tuple(my_nums)] = 1
+            total_cards += 1
+
+    cards = list(num_cards.keys())
+    for card in cards:
+        index = cards.index(card)
+        cards_to_copy = list(range(index+1, index+1+card_points[card]))
+        for new_card in cards_to_copy:
+            num_cards[cards[new_card]] += (1 * num_cards[card])
+        total_cards += (len(cards_to_copy) * num_cards[card])
+    print(total_cards)
+
+if __name__ == '__main__':
+    main()