Created
June 12, 2016 01:20
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| def fib(n): | |
| """ | |
| n start from 0. (f0, f1, f2 ...) | |
| """ | |
| f1, f2 = 1, 1 | |
| for i in xrange(1, n): | |
| f1, f2 = f2, f1 + f2 | |
| return f2 |
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