use proconio::input;

type Coord = (f64, f64);

const MAX_COORD: f64 = 1e9;

fn main() {
    input! {
        n: usize,
        xy: [(f64, f64); n],
        zw: [(f64, f64); n],
    }

    let rotated_xy = to_rotated(&xy);
    let rotated_zw = to_rotated(&zw);

    let max_dist_xy = calc_max_dist(&rotated_xy);
    let max_dist_zw = calc_max_dist(&rotated_zw);

    println!("{}", max_dist_zw - max_dist_xy);
}

fn calc_rotated_coord(coord: Coord) -> Coord {
    (coord.0 - coord.1, coord.0 + coord.1)
}

fn to_rotated(coords: &[Coord]) -> Vec<Coord> {
    coords.iter().cloned().map(calc_rotated_coord).collect()
}

fn calc_max_dist(coords: &[Coord]) -> f64 {
    let (mut min_x, mut max_x, mut min_y, mut max_y) = (MAX_COORD, 0.0_f64, MAX_COORD, 0.0_f64);
    for &(x, y) in coords {
        min_x = min_x.min(x);
        max_x = max_x.max(x);
        min_y = min_y.min(y);
        max_y = max_y.max(y);
    }

    max_x - min_x + max_y - min_y
}