XOR N-bonacci Sequence
[Vietnamese](https://www.codechef.com/download/translated/COOK104/vietnamese/NBONACCI.pdf) and [Bengali](https://www.codechef.com/download/translated/COOK104/bengali/NBONACCI.pdf) as well. An *$N$-bonacci sequence* is an infinite sequence $F_1, F_2, \ldots$ such that for each integer $i \gt N$, $F_i$ is calculated as $f(F_{i-1}, F_{i-2}, \ldots, F_{i-N})$, where $f$ is some function. A *XOR $N$-b
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solution.cppC++17
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