#include <iostream>
#include <cmath>
 
using namespace std;
 
struct Point
{
    long x;
    long y;
 
    Point() : x(0), y(0) {}
 
    Point(Point &point)
    {
        x = point.x;
        y = point.y;
    }
};
 
int main()
{
    int n;
    Point temp;
    cin >> n;
 
    // first point
    cin >> temp.x >> temp.y;
    Point tr(temp);  // top right
    Point tl(temp);  // top left
    Point br(temp);  // bottom right
    Point bl(temp);  // bottom left
 
    n--;
 
    while(n--)
    {
        cin >> temp.x >> temp.y;
 
        if(temp.x <= tl.x && temp.y >= tl.y)
            tl = temp;
        if(temp.x >= tr.x && temp.y >= tr.y)
            tr = temp;
        if(temp.x <= bl.x && temp.y <= bl.y)
            bl = temp;
        if(temp.x >= br.x && temp.y <= br.y)
            br = temp;
    }
 
    long d1 = abs(tr.x - bl.x) + abs(tr.y - bl.y);
    long d2 = abs(tl.x - br.x) + abs(tl.y - br.y);
    long d3 = abs(tr.x - tl.x) + abs(tr.y - tl.y);
    long d4 = abs(bl.x - br.x) + abs(bl.y - br.y);
    long d5 = abs(tl.x - bl.x) + abs(tl.y - bl.y);
    long d6 = abs(tr.x - br.x) + abs(tr.y - br.y);
 
    long result = max(max(d1, d2), max(d3, d4));
    result = max(result, max(d5, d6));
 
    cout << result << endl;
 
    return 0;
}
 

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2 3
5 2
0 1