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30 lines
635 B
Python
30 lines
635 B
Python
from __future__ import print_function
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'''
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Double-base palindromes
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Problem 36
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The decimal number, 585 = 10010010012 (binary), is palindromic in both bases.
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Find the sum of all numbers, less than one million, which are palindromic in base 10 and base 2.
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(Please note that the palindromic number, in either base, may not include leading zeros.)
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'''
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try:
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xrange #Python 2
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except NameError:
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xrange = range #Python 3
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def is_palindrome(n):
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n = str(n)
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if n == n[::-1]:
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return True
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else:
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return False
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total = 0
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for i in xrange(1, 1000000):
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if is_palindrome(i) and is_palindrome(bin(i).split('b')[1]):
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total += i
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print(total) |