fn main() {
    let n: usize = {
        let mut buf = String::new();
        std::io::stdin().read_line(&mut buf).unwrap();
        buf.trim_end().parse().unwrap()
    };

    let (s, t): (usize, usize) = {
        let mut buf = String::new();
        std::io::stdin().read_line(&mut buf).unwrap();
        let mut iter = buf.split_whitespace();
        (
            iter.next().unwrap().parse::<usize>().unwrap() - 1,
            iter.next().unwrap().parse::<usize>().unwrap() - 1,
        )
    };

    let a: Vec<i64> = {
        let mut buf = String::new();
        std::io::stdin().read_line(&mut buf).unwrap();
        let iter = buf.split_whitespace();
        iter.map(|x| x.parse().unwrap()).collect()
    };

    let mut ans: i64 = a[s] - a[t];

    let l = (n + s - t) % n - 1;
    {
        let (mut x, mut y) = (s, t);
        for _ in 0..(l / 2) {
            x = (n + x - 1) % n;
            y = (y + 1) % n;
            ans += a[x] - a[y];
        }    
    }

    let r = n - 2 - l;
    {
        let (mut x, mut y) = (s, t);
        for _ in 0..(r / 2) {
            x = (x + 1) % n;
            y = (n + y - 1) % n;
            ans += a[x] - a[y];
        }
    }

    if l % 2 == 1 && r % 2 == 1 {
        ans += (a[(n + s - (l + 1) / 2) % n] - a[(s + (r + 1) / 2) % n]).abs();
    } else if l % 2 == 1 {
        ans += a[(n + s - (l + 1) / 2) % n];
    } else if r % 2 == 1 {
        ans += a[(s + (r + 1) / 2) % n];
    }

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