Advent of Code 2022 Day 3 as solved by OpenAI's ChatGPT

day3part1.py

# Read the input from the file
with open("input.txt") as f:
    rucksacks = f.readlines()

# Initialize the sum of priorities to 0
sum_of_priorities = 0

# Loop over each rucksack
for rucksack in rucksacks:
    # Split the rucksack into two compartments
    comp1 = rucksack[:len(rucksack) // 2]
    comp2 = rucksack[len(rucksack) // 2:]

    # Create sets for each compartment
    set1 = set(comp1)
    set2 = set(comp2)

    # Find the common items in the two compartments
    common_items = set1.intersection(set2)

    # Loop over the common items
    for item in common_items:
        # Convert the item to its priority
        if item.islower():
            # Lowercase items have priorities 1 through 26
            priority = ord(item) - ord('a') + 1
        else:
            # Uppercase items have priorities 27 through 52
            priority = ord(item) - ord('A') + 27

        # Add the priority to the sum
        sum_of_priorities += priority

# Print the sum of priorities
print(sum_of_priorities)

day3part2.py

# Read the input from the file
with open("input.txt") as f:
    rucksacks = f.readlines()

# Initialize the sum of priorities to 0
sum_of_priorities = 0

# Loop over the rucksacks in groups of three
for i in range(0, len(rucksacks), 3):
    # Create sets for each rucksack
    set1 = set(rucksacks[i].strip())
    set2 = set(rucksacks[i + 1].strip())
    set3 = set(rucksacks[i + 2].strip())

    # Find the common items in the three rucksacks
    common_items = set1.intersection(set2, set3)

    # Loop over the common items
    for item in common_items:
        # Convert the item to its priority
        if item.islower():
            # Lowercase items have priorities 1 through 26
            priority = ord(item) - ord('a') + 1
        else:
            # Uppercase items have priorities 27 through 52
            priority = ord(item) - ord('A') + 27

        # Add the priority to the sum
        sum_of_priorities += priority

# Print the sum of priorities
print(sum_of_priorities)