/*
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@TT_beginner
*/


#include "bits/stdc++.h"
using namespace std;
#define ok1 cerr<<"ok1\n";
#define ok2 cerr<<"ok2\n";
#define M LLONG_MAX
#define rep(i,n) for(ll i=0;i<n;++i)
#define REP(i,s,n) for(ll i=(s);i<(n);++i)
#define repr(i,n) for(ll i=n-1;i>=0;--i)
#define REPR(i,s,n) for(ll i=(s);i>=(n);--(i))
#define all(a) (a).begin(),(a).end()
#define reall(a) (a).rbegin(),(a).rend()
#define pb emplace_back //emplace_backの方が速いが使い慣れてないため
#define DOUBLE fixed << setprecision(15)
#define fi first
#define se second
#define mp make_pair
#define mt make_tuple
#define out(x, y) ((x) < 0 || h <= (x) || (y) < 0 || w <= (y))
#define TO_STRING(VariableName) # VariableName
#define debug(x) cerr<<TO_STRING(x)<<" is: "<<x<<" "<<endl;
const double pi = acos(-1.0L);
typedef vector<int> vi;
typedef vector<string> vs;
typedef long long ll;
typedef vector<ll> vll;
typedef vector<vi> vvi;
typedef vector<vll> vvll;
typedef vector<char> vc;
typedef vector<double> vd;
typedef vector<bool> vb;
typedef deque<ll> dll;
typedef pair<ll, ll> P;
typedef tuple<ll, ll, ll> TLL;
typedef vector<P> vP;
typedef vector<TLL> vTLL;
const ll mod = 1e9 + 7;
//const ll mod = 998244353;
ll dx[8] = { -1,0,1,0,1,1,-1,-1 };
ll dy[8] = { 0,-1,0,1,1,-1,1,-1 };
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }
template<class A, class B>
ostream& operator<<(ostream& ost, const pair<A, B>&p) {
	ost << "{ " << p.first << ", " << p.second << " }";
	return ost;
}
template<class T>
ostream& operator<<(ostream& ost, const vector<T>&v) {
	ost << "{ ";
	for (int i = 0; i<v.size(); i++) {
		if (i)ost << ", ";
		ost << v[i];
	}
	ost << " }";
	return ost;
}
template<class A, class B>
ostream& operator<<(ostream& ost, const map<A, B>&v) {
	ost << "{ ";
	for (auto p : v) {
		ost << "{ " << p.first << ", " << p.second << " }";
	}
	ost << " }";
	return ost;
}
void debugs() { std::cerr << "\n"; }
template <class T, class... Args>
void debugs(const T &x, const Args &... args) {
	std::cerr << x << " ";
	debugs(args...);
}
bool out_check(ll a, ll b) { return (0 <= a && a < b); }
double pitagoras(ll a, ll b, ll c, ll d) {
	double dx = a - b, dy = c - d;
	return pow(dx * dx + dy * dy, 0.5);
}
ll modpow(ll a, ll b, ll mo = mod) { ll c = 1; while (b > 0) { if (b & 1) { c = a * c%mo; }a = a * a%mo; b >>= 1; }return c; }
void Yes(bool x) { cout << ((x) ? "Yes\n" : "No\n"); }
void YES(bool x) { cout << ((x) ? "YES\n" : "NO\n"); }
void yes(bool x) { cout << ((x) ? "yes\n" : "no\n"); }
void Yay(bool x) { cout << ((x) ? "Yay!\n" : ":(\n"); }
void OK(bool x) { cout << ((x) ? "OK!\n" : "NG\n"); }
//*
ll  n, m, d, e, l, r, k, h, w, Q, ans, ret = M;
bool flag = false, flag2 = false, flag3 = false;
//string s, t, u;
//*

/* For AtCoder Only
#include "atcoder/all"
using namespace atcoder;
//*/


#define MAX_N 1000050
long long factorial[1000050];
void init_table() {
	factorial[0] = 1;
	for (int i = 1; i < MAX_N; i++) {
		factorial[i] = factorial[i - 1] * i % mod;
	}
}

long long bisection_power(long long x, long long y) {
	if (y == 0) { return 1; }
	long long t = bisection_power(x * x % mod, y / 2);
	if (y % 2 == 1) { t = t * x % mod; }
	return t;
}

long long nCr(int n, int r) {
	if (n < r || n <= 0 || r < 0) { return 0; }
	long long a = factorial[n];
	long long b = a * bisection_power(factorial[r], (mod - 2)) % mod;
	long long c = b * bisection_power(factorial[n - r], mod - 2) % mod;
	return c % mod;
}

int main() {
	//cin.tie(0); ios::sync_with_stdio(false);//not interactive
	cin >> n;
	vll x(n), y(n);
	rep(i, n) {
		cin >> x[i] >> y[i];
		ll xx = x[i] + y[i];
		ll yy = x[i] - y[i];
		x[i] = xx;
		y[i] = yy;
	}
	sort(all(x));
	sort(all(y));

	cout << max(x.back() - x.front(), y.back() - y.front()) << endl;
}

Measured memory_bytes: 6420