From 17d8c24da40477faa02572458a88474acbf49f4f Mon Sep 17 00:00:00 2001
From: Daniel Heras Quesada <dani.heras@hotmail.com>
Date: Wed, 26 Aug 2026 23:10:00 +0200
Subject: [PATCH] feat: day 4 part 2 done

---
 README.md                           |  2 +-
 src/modules/__tests__/test_day_4.py |  6 +++++-
 src/modules/day_4.py                | 26 ++++++++++++++++++++++++++
 3 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 4e41eeb..3be211b 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@
 |  1  |      |   ⭐   |   ⭐   |
 |  2  |      |   ⭐   |   ⭐   |
 |  3  |      |   ⭐   |   ⭐   |
-|  4  |      |   ⭐   |        |
+|  4  |      |   ⭐   |   ⭐   |
 |  5  |      |        |        |
 |  6  |      |        |        |
 |  7  |      |        |        |
diff --git a/src/modules/__tests__/test_day_4.py b/src/modules/__tests__/test_day_4.py
index aa1be78..b29062c 100644
--- a/src/modules/__tests__/test_day_4.py
+++ b/src/modules/__tests__/test_day_4.py
@@ -1,5 +1,9 @@
-from src.modules.day_4 import count_scratchcard_points
+from src.modules.day_4 import count_real_points, count_scratchcard_points
 
 
 def test_scratchcards():
     assert count_scratchcard_points(r"src/assets/day_4_test.txt") == 13
+
+
+def test_scratchcards_real():
+    assert count_real_points(r"src/assets/day_4_test.txt") == 30
diff --git a/src/modules/day_4.py b/src/modules/day_4.py
index bd62000..900f664 100644
--- a/src/modules/day_4.py
+++ b/src/modules/day_4.py
@@ -3,6 +3,7 @@ import re
 
 def run():
     print(f"Scratchcard points: {count_scratchcard_points(r'src/assets/day_4.txt')}")
+    print(f"Scratchcard real points: {count_real_points(r'src/assets/day_4.txt')}")
 
 
 def count_scratchcard_points(path: str):
@@ -13,6 +14,31 @@ def count_scratchcard_points(path: str):
     return total
 
 
+def count_real_points(path: str):
+    card_list = read_scratchcards(path)
+    card_index_list = [1] * card_list.__len__()
+    index = 0
+    while index < card_list.__len__():
+        card = card_list[index]
+        card_matchings = get_card_matchings(card)
+
+        if card_matchings != 0:
+            for n_card_index in range(index + 1, index + card_matchings + 1):
+                card_index_list[n_card_index] += card_index_list[index]
+
+        index += 1
+
+    return sum(card_index_list)
+
+
+def get_card_matchings(card: tuple[list[int], list[int]]) -> int:
+    sum = 0
+    for number in card[1]:
+        if number in card[0]:
+            sum += 1
+    return sum
+
+
 def get_card_points(card: tuple[list[int], list[int]]) -> int:
     sum = 0
     for number in card[1]: