Fedor Lyanguzov
32 lines
586 B
Python
32 lines
586 B
Python
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data = open('input.txt').read().strip().split("\n")
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data = [list(map(int, x.strip().split(" "))) for x in data]
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less = lambda a, b: a<b
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more = lambda a, b: a>b
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q = lambda a, b: abs(a-b)<=3
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def safe1(l):
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if l[0]<l[1]:
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f = less
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elif l[0]>l[1]:
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f = more
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else:
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return False
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return all(f(a, b) and q(a, b) for a, b in zip(l, l[1:]))
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print(sum(1 for x in data if safe1(x)))
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def safe2(l):
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r = False
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for i in range(len(l)):
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t = l[:]
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del t[i]
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r = r or safe1(t)
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return r
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print(sum(1 for x in data if safe2(x)))
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