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90 lines
2.9 KiB
Python
90 lines
2.9 KiB
Python
2 years ago
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#!/usr/bin/env python3
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INPUT_FILE = 'input'
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def main():
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field = [[ int(n) for n in line ] for line in map(str.strip, open(INPUT_FILE, 'r').readlines()) ]
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print(*field, sep='\n')
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print('#' * 20)
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field_height = len(field)
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field_width = len(field[0])
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# make a temporary copy of the field to track what we've already seen.
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score_field = [[ 0 for y in range(len(field[0])) ] for x in range(len(field))]
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# [y][x]
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# iterate every tree, calculate scenic score
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for x in range(len(field[0])):
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for y in range(len(field)):
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house_height = field[y][x]
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view_distances = []
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# check upwards.
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current_height = -1
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seen_trees = 0
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for y_off in reversed(range(0, y)):
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if field[y_off][x] < house_height:
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#if field[y_off][x] > current_height:
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# current_height = field[y_off][x]
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seen_trees += 1
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else:
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seen_trees += 1
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break
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view_distances.append(seen_trees)
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# check left.
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current_height = -1
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seen_trees = 0
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for x_off in reversed(range(0, x)):
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if field[y][x_off] < house_height:
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#if field[y][x_off] > current_height:
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# current_height = field[y][x_off]
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seen_trees += 1
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else:
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seen_trees += 1
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break
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view_distances.append(seen_trees)
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# check downwards.
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current_height = -1
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seen_trees = 0
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for y_off in range(y+1, field_height):
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if field[y_off][x] < house_height:
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#if field[y_off][x] > current_height:
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# current_height = field[y_off][x]
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seen_trees += 1
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else:
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seen_trees += 1
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break
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view_distances.append(seen_trees)
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# check right.
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current_height = -1
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seen_trees = 0
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for x_off in range(x+1, field_width):
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if field[y][x_off] < house_height:
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#if field[y][x_off] > current_height:
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# current_height = field[y][x_off]
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seen_trees += 1
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else:
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seen_trees += 1
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break
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view_distances.append(seen_trees)
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if x == 2 and y == 3:
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print(view_distances)
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# get sum.
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score = 1
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for num in view_distances:
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score *= num
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score_field[y][x] = score
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print(*score_field, sep='\n')
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best = max([max(_) for _ in score_field])
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print('Best score: {}'.format(best))
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if __name__ == '__main__':
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main()
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