Submission

Score: 50

User: bestisyis...programming

Problemset: อนุกรม

Language: cpp

Time: 0.005 second

Submitted On: 2026-10-08 16:14:13

#include <iostream>
using namespace std;
int main(){
	int a=1,b=1,n;
	long long c=1;
	cin >> n;
	for(int i=1;i<=n-2;i++){
		c=a+b;
		a=b;//b=a
		b=c;//a=c
	}
	cout << c;
}