25 lines
773 B
Python
25 lines
773 B
Python
#!/usr/bin/env python3
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import heapq
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import numpy as np
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arr = np.array([[int(n) for n in line.strip()] for line in open("input.txt")])
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arr = np.pad(arr, (1, 1), 'constant', constant_values=(9999,))
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open_list = [(arr[1, 1], (1, 1))]
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closed_list = np.zeros_like(arr)
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target = arr[:-2, :-2].shape
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while len(open_list):
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val, (y, x) = heapq.heappop(open_list)
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if (y, x) == target:
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print(val - arr[1, 1])
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break
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if closed_list[y, x] != 0:
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continue
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closed_list[y, x] = val
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for yn, xn in [(1, 0), (-1, 0), (0, 1), (0, -1)]:
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if closed_list[y+yn, x+xn] == 0:
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heapq.heappush(open_list, (arr[y+yn, x+xn]+val, (y+yn, x+xn)))
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print(np.sum(closed_list[1:-1, 1:-1] != 0), arr[1:-1, 1:-1].shape[0]*arr[1:-1, 1:-1].shape[1]) |