Submission

Score: 50

User: IKKIWPR

Problemset: อนุกรม

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-08 15:03:13

#include <iostream>
using namespace std;

int main(){
	int n;
	cin >> n;
	int a[90];
	a[1] = 1 , a[2] = 1;
	if (n<=90){
	
		for (int i=3;i<=n;i++){
			a[i] =  a[i-1] + a[i-2];
		}
		cout << a[n];
	}
}