diff --git a/2022/Day9/Day9.py b/2022/Day9/Day9.py index e69de29..452d5c6 100644 --- a/2022/Day9/Day9.py +++ b/2022/Day9/Day9.py @@ -0,0 +1,25 @@ +def do_moves(moves, rope_len): + xs = [0] * rope_len + ys = [0] * rope_len + visited = {(xs[-1], ys[-1])} + + for (mx, my), distance in moves: + for _ in range(distance): + xs[0] += mx + ys[0] += my + for i in range(rope_len - 1): + dx = xs[i + 1] - xs[i] + dy = ys[i + 1] - ys[i] + if abs(dx) == 2 or abs(dy) == 2: + xs[i + 1] = xs[i] + int(dx / 2) + ys[i + 1] = ys[i] + int(dy / 2) + visited.add((xs[-1], ys[-1])) + + return len(visited) + + +if __name__ == '__main__': + offsets = {'L': (-1, 0), 'R': (1, 0), 'D': (0, -1), 'U': (0, 1)} + moves = [(offsets[line[0]], int(line[1:])) for line in open("input.txt", "r")] + print("Part 1:", do_moves(moves, 2)) + print("Part 2:", do_moves(moves, 10)) diff --git a/2022/Day9/input.txt b/2022/Day9/input.txt index e69de29..acb71b1 100644 --- a/2022/Day9/input.txt +++ b/2022/Day9/input.txt @@ -0,0 +1,2000 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