Submission

Score: 40

User: him

Problemset: อนุกรม

Language: cpp

Time: 0.002 second

Submitted On: 2025-09-18 07:50:54

#include <bits/stdc++.h>
using namespace std;
int arr[99];
int main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int n;cin>>n;
	arr[1]=1;
	arr[2]=2;
	for(int i=3;i<=90;i++){
		arr[i]=arr[i-1]+arr[i-2];
	}
	cout<<arr[n-1];
	return 0;
}