26 lines
504 B
Python
26 lines
504 B
Python
from lib_prime import primes
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def cyles(xs):
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if len(xs) <= 1:
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return xs
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return [xs[i:] + xs[:i] for i in range(len(xs))]
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def is_circular(p, prime_set):
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cs = cyles(str(p))
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for c in cs:
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if not int("".join(c)) in prime_set:
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return False
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return True
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def euler_035():
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ps = set(primes(1000000))
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return len([p for p in ps if is_circular(p, ps)])
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if __name__ == "__main__":
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print("e035.py: {}".format(euler_035()))
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assert(euler_035() == 55)
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