Codeforces-Atcoder/codeforces/1421/A.cpp at master · nabil0day/Codeforces-Atcoder · GitHub

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/*****
                                                     __Bismillahir Rahmanir Rahim__
                                               American International University Bangladesh (AIUB)
                                                          Hadiur Rahman Nabil


*****/
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef vector <int> vi;


#define pb push_back
#define mp make_pair
#define gcd(a,b) __gcd(a,b)
#define endl "\n"

const int mod = 1e9 + 7;
const double PI = 3.1415926535897932384626;
const int mod_2 = 998244353;
const int MAX=100005;


void solve()
{
   ll a,b;
   cin>>a>>b;
   if(a==b)
   {
       cout<<"0\n";
   }
   else
   {
     ll c = max(a,b);
     ll sol = (a^c)+(b^c);
     cout<<sol<<"\n";
   }

}


int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    #ifndef ONLINE_JUDGE
    //freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    #endif

 ll t;
 cin>>t;
 while(t--)
 {
     solve();
 }

  return 0;
}