11 lines
455 B
Python
11 lines
455 B
Python
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import numpy as np
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with open('input03', 'r') as file:
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treemap = np.array([[c=='#' for c in line.strip()] for line in file.readlines()])
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rows, cols = treemap.shape
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r = np.arange(rows)
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print(f'Part 1: {treemap[r, (r*3)%cols].sum()} trees hit')
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slopes = [(1,1), (1,3), (1,5), (1,7), (2,1)]
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tps = [treemap[np.arange(0, rows, i), (np.arange(-(-rows//i))*j)%cols].sum() for i,j in slopes]
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print(f'Part 2: {"*".join([str(t) for t in tps])} = {np.prod(tps)}')
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