17 lines
816 B
YAML
17 lines
816 B
YAML
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title: Finding Fibonacci numbers for which the first and last nine digits are pandigital.
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url: http://projecteuler.net/problem=104
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desc: |
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The Fibonacci sequence is defined by the recurrence relation:
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Fn = Fn1 + Fn2, where F1 = 1 and F2 = 1.
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It turns out that F541, which contains 113 digits, is the first Fibonacci number for which the last nine digits are 1-9 pandigital (contain all the digits 1 to 9, but not necessarily in order). And F2749, which contains 575 digits, is the first Fibonacci number for which the first nine digits are 1-9 pandigital.
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Given that Fk is the first Fibonacci number for which the first nine digits AND the last nine digits are 1-9 pandigital, find k.
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solution: |
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Bruteforce
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solutions:
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solve.php:
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desc: Bruteforce - Sooooo slow
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language: php
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