#include <bits/stdc++.h>
using namespace std;

// Class containing the brute-force method
class Solution {
public:
    // Function to find minimum absolute difference
    int minimumDifference(vector<int>& arr) {
        int n = arr.size();
        int minDiff = INT_MAX;

        // Loop through each pair
        for (int i = 0; i < n; i++) {
            for (int j = i + 1; j < n; j++) {

                // Calculate absolute difference
                int diff = abs(arr[i] - arr[j]);

                // Update minDiff if smaller
                if (diff < minDiff)
                    minDiff = diff;
            }
        }

        // Return the minimum difference
        return minDiff;
    }
};

// Main function
int main() {
    vector<int> arr = {4, 9, 1, 32, 13};

    // Create object
    Solution sol;

    // Call the function
    int result = sol.minimumDifference(arr);

    // Print the result
    cout << "Minimum difference is " << result << endl;

    return 0;
}
// Solution class with method
class Solution {
    // Function to find minimum absolute difference
    public int minimumDifference(int[] arr) {
        int n = arr.length;
        int minDiff = Integer.MAX_VALUE;

        // Loop through all pairs
        for (int i = 0; i < n; i++) {
            for (int j = i + 1; j < n; j++) {

                // Compute absolute difference
                int diff = Math.abs(arr[i] - arr[j]);

                // Update minimum
                if (diff < minDiff)
                    minDiff = diff;
            }
        }

        // Return result
        return minDiff;
    }
}

// Class containing the main method
public class Main {
    public static void main(String[] 