#include <bits/stdc++.h>
using namespace std;
#define int long long
//fixed << setprecision()
const int length = 2e5 + 5;


struct Point
{
	int x, y;
	int quadrant;
};


int n;
Point point[length];

pair<int, int> q[5];


inline int dis(int xx, int xxx, int yy, int yyy)
{
	return abs(xx - xxx) + abs(yy - yyy);
}

signed main()
{
	ios::sync_with_stdio(false);
	cin >> n;
	
	
	
	for(int i = 1;i <= n;i++)
	{
		
		cin >> point[i].x >> point[i].y; 
		if(point[i].x >= 0 && point[i].y >= 0)
			point[i].quadrant = 1;
		if(point[i].x < 0 && point[i].y >= 0)
			point[i].quadrant = 2;
		if(point[i].x <= 0 && point[i].y <= 0)
			point[i].quadrant = 3;
		if(point[i].x > 0 && point[i].y <= 0)
			point[i].quadrant = 4;
		//cout << point[i].quadrant << endl;
		
		int qqq = point[i].quadrant;
		int xxx = point[i].x;
		int yyy = point[i].y;
		
		if(dis(xxx, 0, yyy, 0) > dis(q[qqq].first, 0, q[qqq].second, 0))
		{
			q[qqq].first = xxx;
			q[qqq].second = yyy;
		}
		
	}
	int ans = -1;
	for(int i = 1;i <= 4;i++)
	{
		for(int j = 1;j <= 4;j++)
		{
			if(dis(q[i].first, q[j].first, q[i].second, q[j].second) > ans)
			{
				ans = dis(q[i].first, q[j].first, q[i].second, q[j].second);
			}
		}
	}
	
	cout << ans << endl;
	
	return 0;
}