use proconio::{input, marker::Usize1};

fn main() {
    input! {
        n:usize,
        s:Usize1,
        t:Usize1,
        a:[usize;n],
    }

    let ans = if n % 2 != 0 {
        let mut point = [0, 0];
        for i in 0..n {
            match f(s, t, i, n) {
                0 | 2 => point[0] += a[i],
                _ => point[1] += a[i],
            }

            // println!("{:?}",point);
        }

        point[0] as i64 - point[1] as i64
    } else {
        let mut point = [0, 0];
        let mut tmp = vec![];
        for i in 0..n {
            match f(s, t, i, n) {
                0 => point[0] += a[i],
                1 => point[1] += a[i],
                _ => tmp.push(a[i]),
            }

            // println!("{:?}",point);
        }

        let (add_s, add_t) = if tmp.is_empty() {
            (0, 0)
        } else {
            (tmp[0].max(tmp[1]), tmp[0].min(tmp[1]))
        };

        (point[0] + add_s) as i64 - (point[1] + add_t) as i64
    };

    println!("{}", ans);
}

fn f(s: usize, t: usize, p: usize, n: usize) -> usize {
    let d_s = if s < p {
        (p - s).min(s + n - p)
    } else {
        (s - p).min(p + n - s)
    };
    let d_t = if t < p {
        (p - t).min(t + n - p)
    } else {
        (t - p).min(p + n - t)
    };
    if d_s < d_t {
        0
    } else if d_t < d_s {
        1
    } else {
        2
    }
}