#include <bits/stdc++.h>
using namespace std;
long long xl, xr, yu, yd;
long long x, y;
int main() {
  ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);
  long long n;
  cin >> n;
  for (int i = 0; i < n; i++) {
    cin >> x >> y;
    if (i == 0) {
      xl = x;
      xr = x;
      yu = y;
      yd = y;
    } else {
      if (x < xl) xl = x;
      if (x > xr) xr = x;
      if (y > yu) yu = y;
      if (y < yd) yd = y;
    }
  }
  long long ans = max(yu - yd, xr - xl);
  cout << ans * ans << endl;
  return 0;
}
