Cod sursa(job #1906005)

Utilizator ASTELOTudor Enescu ASTELO Data 6 martie 2017 12:01:00
Problema Nunta Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.25 kb
Raporteaza aceasta sursa 
#include<cstdio>
long long a,b,c;
int n;
int main ()
{
freopen("nunta.in","r",stdin);
freopen("nunta.out","w",stdout);
scanf("%d",&n);
a=1;
b=2;
for(int i=3;i<=n;i++)
    {
    c=b;
    b=a+b;
    a=c;
    }
printf("%lld",b);
return 0;
}