feat: part 1 of day 3 complete

day3/main.py

@@ -0,0 +1,37 @@
+rucksacks = []
+
+input_file = open("input.txt", "r")
+lines = input_file.readlines()
+
+for line in lines:
+    line = line.replace("\n", "")
+    midpoint = int(len(line) / 2)
+
+    first_compartment = list(line[:midpoint])
+    second_compartment = list(line[midpoint:])
+
+    rucksacks.append([])
+
+    rucksacks[-1].append(first_compartment)
+    rucksacks[-1].append(second_compartment)
+
+
+# part 1
+
+
+def get_item_in_common(first_compartment, second_compartment):
+    item = [value for value in first_compartment if value in second_compartment][0]
+    return item
+
+
+letters = list("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
+
+total_priority = 0
+for rucksack in rucksacks:
+    first_compartment = rucksack[0]
+    second_compartment = rucksack[1]
+
+    in_common = get_item_in_common(first_compartment, second_compartment)
+    total_priority += letters.index(in_common) + 1
+
+print("Part 1: " + str(total_priority))