#include "bits/stdc++.h"
using namespace std;
const int MAXN = 1e9;
int n, a[1000005], num = MAXN;

int main() {
	cin >> n;
	for (int i = 1; i <= n; i++) {
		cin >> a[i];
	}
	for (int m = 1; m < n; m++) {
		sort(a + m + 1, a + n);
		sort(a + 1, a + m);
		if (num > a[1] - a[m]) {
			num = a[1] - a[m];
		}
	}
	cout << num ;
	return 0;
}

求助，在线等。。。。。。