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49 lines
1019 B
Python
49 lines
1019 B
Python
4 years ago
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lines = [x.strip() for x in open('input', 'r').readlines()]
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east = 0
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north = 0
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# 0 = E, 1 = N, 2 = W, 3 = S
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wp_east = 10
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wp_north = 1
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def serialize():
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"""Debug a position"""
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return f'N{north} E{east} / N{wp_north} E{wp_east}'
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def rot90(x, y):
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"""Rotates counter clockwise"""
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return [-y, x]
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for line in lines:
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pos = serialize()
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command = line[0]
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number = int(line[1:])
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if command in ['S', 'W', 'R']:
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number *= -1
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if command in ['N', 'S']:
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wp_north += number
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elif command in ['E', 'W']:
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wp_east += number
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elif command in ['R', 'L']:
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number = number // 90 % 4
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for _ in range(number):
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wp_east, wp_north = rot90(wp_east, wp_north)
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elif command in ['F']:
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north += wp_north * number
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east += wp_east * number
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else:
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raise Exception(f'Unknown command: {command}')
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print(f'{line}: \t{pos} -> {serialize()}')
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print()
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manhattan = abs(north) + abs(east)
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print('Solution')
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print(manhattan)
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