Cod sursa(job #731684)
Utilizator | Buf Laura LauraB | Data | 8 aprilie 2012 21:34:37 |
---|---|---|---|
Problema | Al k-lea termen Fibonacci | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.4 kb |
#include <fstream>
using namespace std;
ifstream fin("kfib.in");
ofstream fout("kfib.out");
long long fibb(long long k);
int main()
{
long long k;
fin >> k;
fout << fibb(k);
fin.close();
fout.close();
return 0;
}
long long fibb(long long k)
{
long long f1 = 1, f2 = 1, f3 = 0;
int i = 3;
while(i <= k)
{
f3 = f1 + f2;
f1 = f2;
f2 = f3;
i++;
}
return f3;
}