ProcedurProgramavimas_3.14

#include <fstream>
#include <iostream>
using namespace std;
ifstream fin("14.in");
ofstream fout("14.txt");
void recurse(long long int n, long long int as, long long int bs, long long int sums, long long int pras, long long int ys)
{
    if(ys!=n){
        sums=bs+as;
        pras=as;
        as=bs;
        bs=pras+bs;
        ys++;
        recurse(n, as, bs, sums, pras, ys);}
    else{
       ofstream fout("14.txt");
       fout<<sums<<endl;}
}
int main()
{
    long long int s, a=0, b=1, sum=1, pra=1, y=1;
    fin>>s;
    if(s==0){fout<<"0"<<endl;}
    else{recurse(s,a,b,sum,pra,y);}
    return 0;
}