balanced array

/*package whatever //do not write package name here */

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

class GFG 
{
	public static void main (String[] args)
	{
	    Scanner s=new Scanner(System.in);
	    int a=s.nextInt();
        for(int j=0;j<a;j++)
        {
            int b=s.nextInt(),x=0,y=0,z=0;
            int c[]=new int[b];
            for(int i=0;i<b;i++)
            {
                c[i]=s.nextInt();
            }
            if(b>2)
            {
                for(int i=0;i<b/2;i++)
                {
                    x+=c[i];
                }
                for(int i=b/2;i<b;i++)
                {
                    y+=c[i];
                }
                z=Math.abs(x-y);
            }
            else
            {
                x=c[0];
                y=c[1];
                z=Math.abs(x-y);
            }
            System.out.println(z);
        }
	}
}


Example:
Input:
2
6
1 2 1 2 1 3
2
20 10

Output:
2
10

Explanation:
Suppose, we have an array 1 2 1 2 1 3. The Sum of first three elements is 1 + 2 + 1 = 4 and sum of last three elements is 2 + 1 + 3 = 6
So this is unbalanced, to make it balanced the minimum number we can add is 2 to any element in first half.