#include <bits/stdc++.h>

using namespace std;

int main() {
    long long a[100001] = {0};
    int n;
    cin >> n;
    long long minn = INT32_MAX;
    for (int i = 0; i < n; ++i) {
        cin >> a[i];
    }
    sort(a, a + n);
    for (int i = 0; i < n - 1; ++i) {
        minn = min(minn, a[i + 1] - a[i]);
    }
    cout << minn;
    return 0;
}