#include <bits/stdc++.h>
using namespace std;
int main() {
  int i, j, k;
  int n;
  cin >> n;
  long arr[n][2];
  for (i = 0; i < n; i++) cin >> arr[i][0] >> arr[i][1];
  long long minx, miny, maxx, maxy;
  minx = arr[0][0];
  miny = arr[0][1];
  maxx = arr[0][0];
  maxy = arr[0][1];
  for (i = 0; i < n; i++) {
    if (minx > arr[i][0]) minx = arr[i][0];
    if (miny > arr[i][1]) miny = arr[i][1];
    if (maxx < arr[i][0]) maxx = arr[i][0];
    if (maxy < arr[i][1]) maxy = arr[i][1];
  }
  long long l1, l2;
  l1 = (maxx - minx);
  l2 = (maxy - miny);
  if (l1 > l2)
    cout << l1 * l1;
  else
    cout << l2 * l2;
}
