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2DBussy shad/ban :!marseykneel::marseydeux::marseykneel:  1yr ago (text post) 386 thread views #129962

Advent of Code 2022 : Day 9

grate filter edition

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Late submission because I was watching divegrass and nearly forgot to submit today :marseysweating:

Messy but it works. Part 2 made me have to rewrite the whole thing since I assumed the tail would always take the position of the head in the previous state.

with open('day9_input.txt', 'r') as inp:
    foo = inp.read().split('\n')

rope_pos = [[0,0], [0,0], [0,0], [0,0], [0,0], [0,0], [0,0], [0,0], [0,0], [0,0]]
history = set()

for f in foo:
    f = f.split(' ')
    for n in range(int(f[1])):
        for m in range(len(prev_pos)):
            prev_pos[m] = rope_pos[m]
        if f[0] == 'L':
            rope_pos[0] = [rope_pos[0][0]-1, rope_pos[0][1]]
        elif f[0] == 'R':
            rope_pos[0] = [rope_pos[0][0]+1, rope_pos[0][1]]
        elif f[0] == 'U':
            rope_pos[0] = [rope_pos[0][0], rope_pos[0][1]+1]
        elif f[0] == 'D':
            rope_pos[0] = [rope_pos[0][0], rope_pos[0][1]-1]
        for m in range(1, len(rope_pos)):
            if abs(rope_pos[m-1][0] - rope_pos[m][0]) > 1 or abs(rope_pos[m-1][1] - rope_pos[m][1]) > 1:
                candidate_pos = [[rope_pos[m][0]+1, rope_pos[m][1]],
                                [rope_pos[m][0]-1, rope_pos[m][1]],
                                [rope_pos[m][0], rope_pos[m][1]+1],
                                [rope_pos[m][0], rope_pos[m][1]-1],
                                [rope_pos[m][0]+1, rope_pos[m][1]+1],
                                [rope_pos[m][0]-1, rope_pos[m][1]+1],
                                [rope_pos[m][0]+1, rope_pos[m][1]-1],
                                [rope_pos[m][0]-1, rope_pos[m][1]-1]]
                min_displacement = 10
                min_candidate = []
                for c in candidate_pos:
                    if (abs(rope_pos[m-1][0] - c[0]) + abs(rope_pos[m-1][1] - c[1])) < min_displacement:
                        min_displacement = (abs(rope_pos[m-1][0] - c[0]) + abs(rope_pos[m-1][1] - c[1]))
                        min_candidate = c
                rope_pos[m] = min_candidate
        history.add(str(rope_pos[-1]))
print(len(history))
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divegrass

just looked that up, sounds funny. is it still going or is it over?

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