Help me in solving EQUAL2 problem

help
,
1

My issue

plz give me some approach

My code

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

class Codechef
{
     public static int minMoves(int A, int B) {
        // Check if it's impossible to make them equal
        if(A==B){
            return 0;
        }
        // if ((A - B) % 4 != 0) {
        //     return -1;
        // }

        // Calculate the minimum number of moves using parity analysis
        int diff = Math.abs(A - B);
        if (diff % 2 == 0) {
            return diff / 2;
        } else {
            return diff / 2 + 1;
        }
    }

    public
 
static
 
void
 
main(String[] args)
 
{
        Scanner scanner = new Scanner(System.in);
        int T = scanner.nextInt();  // Number of test cases


        
for (int i = 0; i < T; i++) {
            int A = scanner.nextInt();
            int B = scanner.nextInt();
            int result = minMoves(A, B);
            System.out.println(result);
        }
    }

}

Problem Link: Equality Etiquette Practice Coding Problem - CodeChef

2

hint: just focus on the difference and try to increase and decrease the difference