1311A - add odd or subrtract even.cpp

#include<iostream>
#include<math.h>
#include<bits/stdc++.h>
using namespace std;
int main(){
   int t;
   cin>>t;
   while(t--){
    int  a,b;
    cin>>a>>b;
    if(a==b)
        cout<<0;
    else if(a>b){
        if((a-b)%2==0)
            cout<<1;
        else
            cout<<2;
    }
    else{
        if((b-a)%2!=0)
            cout<<1;
        else
            cout<<2;
    }
    cout<<"\n";
   }
}