Discussion About Finquest

This is Discussion thread about Finquest

Please tell which step am I missing in my code as I am getting the right output for a number of test cases.

we might need your code to tell u so…

import java.util.*;
public class Main {
public static void main(String args[]) {
Scanner scn=new Scanner(System.in);
int n=scn.nextInt();
for(int i=0;i<n;i++)
{
int x=scn.nextInt();
int arr[]=new int[x];
for(int j=0;j<x;j++)
{
arr[j]=scn.nextInt();

	}
	int max[]=new int[x];
	max[x-1]=-1;
	for(int j=x-2;j>-1;j--)
	{
		
		if(max[j+1]!=-1 && arr[j]<arr[max[j+1]])
		{
			max[j]=max[j+1];

		}
		else if(arr[j]<arr[j+1])
		{
			max[j]=j+1;
		}
		else
		max[j]=-1;

	}
	int t=0;
	for(int j=0;j<max.length;j++)
	{
	
		 if(max[j]==-1)
		 t+=0;
		 else
		 {
			 t+=(arr[max[j]]-arr[j]);
		 }
	}
	
	System.out.println(t);

}


}

}