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August 29, 2015 13:57
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#include <iostream> | |
using ulong=unsigned long; | |
ulong fibo(ulong n){ | |
return n<2?n:fibo(n-1)+fibo(n-2); | |
} | |
int main(){ | |
ulong n; | |
std::cin>>n; | |
std::cout<<fibo(n)<<std::endl; | |
} |
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