Submission

Score: 50

User: Angpao

Problemset: อนุกรม

Language: cpp

Time: 1.096 second

Submitted On: 2025-10-08 14:59:00

#include <iostream>
using namespace std;
unsigned long long n;
int Fi(int x)
{
   if(x==1||x==2){
        return 1;
   }

   return Fi(x-1)+Fi(x-2);
}

int main()
{
    cin>>n;
    cout<<Fi(n);
}