#include<bits/stdc++.h> using namespace std; int main(){ int a[100] = {}; int n; cin >> n; int min = 1000000; for (int i = 1; i <= n; i++) { cin >> a[i]; } for (int i = 1; i <= n; i++) { for (int j = i + 1; j <= n; j++) { cout << a[i] << "," << a[j] << endl; if (abs(a[i] - a[j]) < min) { min = abs(a[i] - a[j]); } } } cout << min; return 0; }