Help me in solving FINDIAMETER problem

help
,
1

My issue

help me in code

My code

import java.util.*;
import java.lang.*;
import java.io.*;

class Codechef {
    public static void main(String[] args) throws java.lang.Exception {
        Scanner sc = new Scanner(System.in);
        int t = sc.nextInt();
        while (t-- > 0) {
            int len = sc.nextInt();
            int[] arr = new int[len];
            int d = 0;
            for (int i = 0; i<len; i++) {
                arr[i] = sc.nextInt();
            }
            for (int j = 0; j<len; j++) {
                for (int k = j+1; k<len; k++) {
                    d = Math.max(d, Math.min(Math.abs(j-k), Math.abs(arr[j] - arr[k])));
                }
            }
            System.out.println(d);

        }

    }
}

Problem Link: Find Diameter Practice Coding Problem - CodeChef