Created
May 29, 2019 05:06
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| steps = int(input()) | |
| a = [0] * max(steps, 2) | |
| a[0] = 1 | |
| a[1] = 2 | |
| for i in range(2, steps): | |
| a[i] = a[i-1] + a[i-2] | |
| print(a[steps-1]) |
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