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1
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import functools |
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2
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import operator |
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3
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import pathlib |
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4
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5
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BOARD_SIZE = 99 |
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6
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7
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8
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def is_visible(board, x, y): |
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9
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return any( |
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10
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board[y][x] > max(trees) |
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11
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for trees in get_neighbours_tree(board, x, y) |
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12
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) |
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13
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14
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15
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def count_visible(board): |
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16
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return sum( |
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17
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is_visible(board, x, y) |
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18
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for x in range(1, BOARD_SIZE - 1) |
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19
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for y in range(1, BOARD_SIZE - 1) |
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20
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) + (BOARD_SIZE - 1) * 4 |
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21
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22
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23
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def get_neighbours_tree(board, x, y): |
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24
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return ( |
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25
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board[y][:x][::-1], |
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26
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board[y][x + 1:], |
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27
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tuple(line[x] for line in board[:y])[::-1], |
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28
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tuple(line[x] for line in board[y + 1:]) |
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29
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) |
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30
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31
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32
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def get_first_non_visible_from(h, trees): |
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33
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for idx, tree in enumerate(trees, start=1): |
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34
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if tree >= h: |
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35
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return idx |
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36
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return len(trees) |
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37
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38
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39
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def scenic_core(board, x, y): |
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40
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return functools.reduce( |
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41
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operator.mul, |
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42
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( |
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43
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get_first_non_visible_from(board[y][x], trees) |
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44
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for trees in get_neighbours_tree(board, x, y) |
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45
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) |
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46
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) |
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47
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48
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49
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def get_highest_scenic_score(board): |
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50
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return max( |
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51
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scenic_core(board, x, y) |
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52
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for x in range(BOARD_SIZE) |
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53
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for y in range(BOARD_SIZE) |
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54
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) |
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55
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56
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57
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def main(): |
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58
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content = pathlib.Path('./input.txt').read_text() |
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59
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board = [line for line in content.splitlines()] |
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60
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61
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print('Part 1:', count_visible(board)) |
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62
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print('Part 2:', get_highest_scenic_score(board)) |
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63
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64
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65
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if __name__ == '__main__': |
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66
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main() |
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67
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Sigmanificient /
aoc
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