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- #include <iostream>
- using namespace std;
- int fibsk (int n)
- {
- if (n==1)
- {
- return 1;
- }
- else if (n==2)
- {
- return 1;
- }
- else if (n==3)
- {
- return 1;
- }
- else
- return fibsk(n-1) + fibsk(n-2) + fibsk(n-3);
- }
- int main()
- {
- int sk;
- cin>>sk;
- cout<<fibsk(sk);
- cin.get();
- cin.get();
- return 0;
- }
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