Cod sursa(job #2155776)
Utilizator | Data | 8 martie 2018 09:14:53 | |
---|---|---|---|
Problema | Al k-lea termen Fibonacci | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.47 kb |
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("kfib.in");
ofstream g("kfib.out");
long long k,a,b,c,i;
/*int fib(int n)
{
if (n==1 || n==2) return 1;
else return(fib(n-1)+fib(n-2));
}*/
int main()
{
f>>k;
if (k==1 || k==2) g<<1;
else
{
a=1;
b=1;
for (i=3;i<=k;i++)
{
c=a+b;
a=b;
b=c;
}
g<<c;
}
return 0;
}