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Fibonacci-like sequences P68314
Inspired by the Fibonacci sequence F0 = 0, F1 = 1, Fn = Fn−1 + Fn−2 for n ≥ 2, Xavier defined his own sequence of numbers:
| X0 = 0, X1 = 1, Xn = XXn−1 + XXn−2 for n ≥ 2 . |
Max also wanted his own sequence of numbers, so he modified Xavier’s definition a bit:
| M0 = 1, M1 = 0, Mn = MMn−1 + MMn−2 for n ≥ 2 . |
Can you compute the n-th term of any of these two new sequences?
Input
Input consists of several cases, each with a character c, which is ‘X’ or ‘M’, and a natural n between 0 and 109.
Output
For each case, print Xn or Mn depending on c.
Public test cases
Input
X 0 X 1 X 2 X 3 M 0 M 1 M 2 M 3
Output
0 1 1 2 1 0 1 1
Information
- Author
- Félix Moreno
- Language
- English
- Official solutions
- C++
- User solutions
- C++