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Project Euler #104 notes
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| # Below function returns the index of the first number in the | |
| # fibonacci sequence where first nine digits contain integers 1-9 | |
| def first_nine(): | |
| a, b, indexb = 1, 1, 2 | |
| nine = set('123456789') | |
| b_first_nine = set(str(b)[:9]) | |
| while (nine <= b_first_nine) == False: | |
| a, b, indexb = b, b + a, indexb + 1 | |
| b_first_nine = set(str(b)[:9]) | |
| print indexb |
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