use proconio::input;

fn main() {
	input! {
		n: usize,
		a: [usize; n],
	}

    let m = a[0] + a[n-1];

    for i in 0..(n+1)/2 {
        if a[i] + a[n-1-i] != m {
            println!("No");
            return;
        }
    }

    println!("Yes");
}