2022 day 3 complete

2022/day_3/part 2 solution.py

@@ -1,4 +1,4 @@
-with open(r'advent_of_code\2022\day_3\input.txt', 'r') as file:
+with open(r'D:\repos\advent_of_code\2022\day_3\input.txt', 'r') as file:
     input = file.read()
 
 test_input = '''vJrwpWtwJgWrhcsFMMfFFhFp
@@ -19,4 +19,19 @@ def task_1(file):
         ascii_start = 96 if common_item.islower() else 38
         priority += ord(common_item) - ascii_start
     print("Task 1 result: " + str(priority))
-task_1(input)
+task_1(input)
+
+def task_2(file):
+    # group 3 lines together, find the common item between all 3 lines
+    # using ASCII
+    priority = 0
+    #take the input and split it into groups of 3 lines
+    lines = file.split('\n')
+    grouped_lines = [lines[i:i + 3] for i in range(0, len(lines), 3)]
+    for group in grouped_lines:
+        common_items_set = set(group[0]).intersection(group[1], group[2])
+        common_item = common_items_set.pop()
+        ascii_start = 96 if common_item.islower() else 38
+        priority += ord(common_item) - ascii_start
+    print("Task 2 result: " + str(priority))
+task_2(input)