// // Created by CCG on 25-7-11. // #include<bits/stdc++.h> using namespace std; int main() { long long a[1001] = {},min=999999999999999999; long long n; cin >> n; for (int i = 1; i <= n; i++) { cin >> a[i]; } // min = a[2] - a[1]; for (int i = 1; i <= n; i++) { for (int j = i + 1; j <= n; j++) { int s = abs(a[i] - a[j]); if (s < min) { min = s; } } } cout << min; return 0; }