Cod sursa(job #1676733)

Utilizator AndreiTACAndrei Cristian AndreiTAC Data 6 aprilie 2016 09:30:09
Problema Nunta Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.32 kb
Raporteaza aceasta sursa 
#include <fstream>

using namespace std;

int main()
{
    ifstream in("nunta.in");
    ofstream out("nunta.out");
    unsigned long long int n,a,b,c,i;
    in>>n;
    a=1;
    b=2;
    for(i=3;i<=n;i++)
        {
            c=a;
            a=b;
            b+=c;
        }
    out<<b;
    return 0;
}