#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, ma, mi;
  cin >> n;
  int arr[n];
  for (int i = 0; i < n; i++) {
    cin >> arr[i];
  }
  sort(arr, arr + n);
  ma = arr[n - 2] - arr[0];
  mi = arr[n - 1] - arr[1];
  if (ma > mi) {
    cout << mi;
  } else
    cout << ma;
  return 0;
}
