#include <bits/stdc++.h> using namespace std; int main() { long long n, x, y, a, b, c, d; a = c = -0x3f3f3f3f; b = d = 0x3f3f3f3f; cin >> n; for (int i = 0; i < n; i++) { cin >> x >> y; a = max(a, x + y); b = min(b, x + y); c = max(c, x - y); d = min(d, x - y); } cout << max(a - b, c - d) << endl; return 0; }