Submission

Score: 40

User: SonnyHappy108

Problemset: อนุกรม

Language: cpp

Time: 0.002 second

Submitted On: 2026-04-10 14:03:07

#include <bits/stdc++.h>
using namespace std;
int main()
{
	long double a=1,b=1;
	int n;
	cin >> n;
	for(int i=0;i<(n-1)/2;i++){
		a+=b;
		b+=a;
	}
	if(n%2==1){
		cout << a;
	}
	else{
		cout << b;
	}
}