18 lines
528 B
Python
18 lines
528 B
Python
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def get_file(fn):
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for l in open(fn, 'r'):
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lst = list(map(lambda x: int(x), l.strip().split(',')))
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yield ((lst[0], lst[1]), (lst[2], lst[3]), (lst[4], lst[5]),
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(lst[0], lst[1]), (lst[2], lst[3]))
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def pro_multi(p, q):
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return p[0] * q[1] - p[1] * q[0]
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def judge(l):
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for i in range((len(l) + 1) // 2):
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if pro_multi(l[i + 1], l[i]) * pro_multi(l[i + 2], l[i]) > 0:
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return False
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return True
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print(len(list(filter(judge, get_file('../resource/triangles.txt')))))
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