addone.java

import java.io.*;
import java.lang.reflect.Array;
import java.util.*;
import java.awt.Point;
 
public class addone {
    static int mod=(int)1e9+7;
    public static void main(String[] args) throws Exception {
        Scanner sc=new Scanner(System.in);
        int t=sc.nextInt();
        StringBuilder sb=new StringBuilder();
        while (t-->0){
            int a=sc.nextInt(),b=sc.nextInt();
            if (a==b) sb.append(0+"\n");
            else if (a-b<0){
                if ((b-a)%2==1){
                    sb.append(1+"\n");
                }else sb.append(2+"\n");
            }else {
                if ((a-b)%2==0){
                    sb.append(1+"\n");
                }else sb.append(2+"\n");
            }
        }
        System.out.println(sb);
    }
}