#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int n;
  cin >> n;
  vector<int> aa(n);
  for (int i = 0; i < n; i++) {
    cin >> aa[i];
  }
  sort(aa.begin(), aa.end());
  if (aa[n - 2] - aa[0] < aa[n - 1] - aa[1]) {
    cout << aa[n - 2] - aa[0] << endl;
  } else {
    cout << aa[n - 1] - aa[1] << endl;
  }
}
