#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
#define ull unsigned long long
#define ld long double
 
void Free_palestine() {
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
 
const int N = 2e5 + 5;
const int MOD = 1e9 + 7;
const int MAXN = 1e5 + 5;
int arr[MAXN];
 
signed main(){
  Free_palestine();
  int n; cin>>n;
 
 
  for(int i = 0; i < n; i++){
    cin>>arr[i];
  }
 
  int left = 0;
    int right = n - 1;
    bool is_palindrome = true;
 
    while (left < right) {
        if (arr[left] != arr[right]) {
            is_palindrome = false;
            break; 
        }
        left++;
        right--;
    }
 
    if (is_palindrome) {
        cout << "YES\n";
    } else {
        cout << "NO\n";
    }
}

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

NQoxIDMgMiAzIDEK

5
1 3 2 3 1