22 lines
429 B
Python
22 lines
429 B
Python
DIVIDER = 10**9 + 7
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def progress(m):
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return (
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(m[1] + m[2] + m[3] + m[4]) % DIVIDER,
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(m[3] + m[4] + m[0]) % DIVIDER,
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(m[4] + m[0]) % DIVIDER,
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(m[1] + m[0]) % DIVIDER,
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(m[1] + m[2] + m[0]) % DIVIDER,
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)
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if __name__ == "__main__":
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M = (1, 1, 1, 1, 1)
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# M2 = (1 + 1 + 1, )
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N = int(input())
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for _ in range(1, N):
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M = progress(M)
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print(sum(M) % DIVIDER)
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