Submission

Score: 100

User: Sol2468

Problemset: อนุกรม

Language: cpp

Time: 0.003 second

Submitted On: 2026-10-14 02:00:52

#include <bits/stdc++.h>
#define ll long long
using namespace std ;

vector<ll> arr = {1,1} ;
ll n ;

int main(){
    ios_base::sync_with_stdio(false) ;
    cin.tie(NULL) ;
    cin >> n ;
    for(int i=2 ; i<n ; i++){
        arr.push_back(arr[i-2]+arr[i-1]) ;
    }
    // for(int i : arr){
    //     cout << i << " " ;
    // }
    cout << arr[n-1] ;
    return 0 ;
}