#quiz07 q1

#include <iostream>
using namespace std;

long  fibonacci(long n) {
  if (n==0) {
    return 0;
  }
  else if (n==1) {
    return 1;
  }
  else {
    long x=0;
    long y=1;
    long z; //next number
    for (int i=0; i< n-1; i++){
      z=x+y;
      x=y;
      y=z;
    }
  return z;
  }
}

int main(){
long n;
cout << "Enter the nth number of the fibonacci series that you want to know the value: "; cin >> n;
cout <<   fibonacci(n) << endl;
  return 0;
}