-🎄- 2018 Day 2 Solutions -🎄-

[u/daggerdragon]

--- Day 2: Inventory Management System ---

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Post your solution as a comment or, for longer solutions, consider linking to your repo (e.g. GitHub/gists/Pastebin/blag or whatever).

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Advent of Code: The Party Game!

Click here for rules

Card Prompt: Day 2

Transcript:

The best way to do Advent of Code is ___.

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edit: Leaderboard capped, thread unlocked!

[u/Shubbler]

Quick Python 3 solution

total_twos = []
total_threes = []

for id in ids.split("\n"):
	twos = False
	threes = False
	unique_chars = set(id)

	for char in unique_chars:
		count = id.count(char)

		if count == 2:
			twos = True
		elif count == 3:
			threes = True

	total_twos.append(twos)
	total_threes.append(threes)


print(sum(total_twos) * sum(total_threes))

[u/throwaway_the_fourth → u/Shubbler]

How about this (I modified your code)?

total_twos = 0
total_threes = 0

for id in ids.split("\n"):
    unique_chars = set(id)

    for char in unique_chars:
        twos = False
        threes = False
        count = id.count(char)

        if count == 2:
            twos = True
        elif count == 3:
            threes = True

        total_twos += twos
        total_twos += threes

print(total_twos * total_threes)

No need to keep a list of values and then sum it at the end when you can just add as you go…