import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();
        
        if(n=0){
            System.out.println("Invalid input");
            return;
        }
        int a[] = new int[n];
        for(int i = 0;i < n;i++){
            a[i] = sc.nextInt();
        }
        
        int m = n-1;
        
        for(int i = 0;i < n/2;i++){
            if(a[i] !=a[m]){
               System.out.println("NO");
            return; 
            }
            m--;
        }
        System.out.println("Yes");
    }
}