Submission

Score: 50

User: Sol2468

Problemset: อนุกรม

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-14 01:55:20

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

vector<int> arr = {1,1} ;
int 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]) ;
    }
    cout << arr[n-1] ;
    return 0 ;
}