Day 2: Cube Conundrum


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  • meant2live218@lemmy.world
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    11 months ago

    My (awful) Python solves. Much easier than day 1’s, although I did run into an issue with trimming whitespace characters with my approach (Game 96 wouldn’t flag properly).

    Part 1
    with open('02A_input.txt', 'r') as file:
        data = file.readlines()
        
    possibleGames=[]
    
    for game in data:
        # Find Game number
        game = game.removeprefix("Game ")
        gameNumber = int(game[0:game.find(":")])
        # Break Game into rounds (split using semicolons)
        game=game[game.find(":")+1:]
        rounds=game.split(";")
        # For each round, determine the maximum number of Red, Blue, Green items shown at a time
        rgb=[0,0,0]
        for round in rounds:
            combos=round.split(",")
            for combo in combos:
                combo=combo.strip()
                number=int(combo[0:combo.find(" ")])
                if combo.endswith("red"):
                    if number>rgb[0]:
                        rgb[0]=number
                elif combo.endswith("green"):
                    if number>rgb[1]:
                        rgb[1]=number
                elif combo.endswith("blue"):
                    if number>rgb[2]:
                        rgb[2]=number
        # If Red>12, Green>13, Blue>14, append Game number to possibleGames
        if not (rgb[0]>12 or rgb[1]>13 or rgb[2]>14):
            possibleGames.append(gameNumber)
    
    print(sum(possibleGames))
    
    Part 2
    with open('02A_input.txt', 'r') as file:
        data = file.readlines()
        
    powers=[]
    
    for game in data:
        # Find Game number
        game = game.removeprefix("Game ")
        # Break Game into rounds (split using semicolons)
        game=game[game.find(":")+1:]
        rounds=game.split(";")
        # For each round, determine the maximum number of Red, Blue, Green items shown at a time
        # Note: This could be faster, since we don't need to worry about actual rounds
        rgb=[0,0,0]
        for round in rounds:
            combos=round.split(",")
            for combo in combos:
                combo=combo.strip()
                number=int(combo[0:combo.find(" ")])
                if combo.endswith("red"):
                    if number>rgb[0]:
                        rgb[0]=number
                elif combo.endswith("green"):
                    if number>rgb[1]:
                        rgb[1]=number
                elif combo.endswith("blue"):
                    if number>rgb[2]:
                        rgb[2]=number
        # Multiple R, G, B to find the "power" of the game
        # Append Power to the list
        powers.append(rgb[0]*rgb[1]*rgb[2])
        
    print(sum(powers))