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reorganize dir
Signed-off-by: Mia Steinkirch <mia.steinkirch@gmail.com>
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other_resources/Project-Euler/046-gold_other.py
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64
other_resources/Project-Euler/046-gold_other.py
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#!/usr/bin/python3
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# mari von steinkirch @2013
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# steinkirch at gmail
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def isPrime(n):
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n = abs(int(n))
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if n < 2:
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return False
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if n == 2:
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return True
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if not n & 1:
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return False
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for x in range(3, int(n**0.5)+1, 2):
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if n % x == 0:
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return False
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return True
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def generetePrimes(n):
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if n == 2: return [2]
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elif n < 2: return []
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s = [i for i in range(3, n+1,2)]
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mroot = n ** 0.5
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half = (n+1)//2-1
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i = 0
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m = 3
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while m <= mroot:
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if s[i]:
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j = (m*m - 3)//2
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s[j] = 0
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while j < half:
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s[j] = 0
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j += m
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i = i+1
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m = 2*i+3
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return [2]+[x for x in s if x]
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def gold_other(n):
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primes_for_n = generetePrimes(n)
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numbers = {prime + 2*x**2 for prime in primes_for_n for x in range(1, int(n**0.5))}
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conj = {x for x in range(3, n, 2) if not isPrime(x)}
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while True:
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candidates = conj - numbers
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if not candidates:
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gold_other(2*n)
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else:
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return min(candidates)
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def main():
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import time
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start = time.time()
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print(gold_other(10000))
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elapsed = (time.time() - start)
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print('Tests Passed!\n It took %s seconds to run them.' % (elapsed))
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if __name__ == '__main__':
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main()
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