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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. // ============ TYPEDEFS & MACROS ============
  5. typedef long long ll;
  6. #define all(x) x.begin(), x.end()
  7. #define ln "\n"
  8. const int MY_MOD = 1e9 + 7;
  9. void Read()
  10. {
  11.     // File I/O
  12.     freopen("input.txt", "r", stdin);
  13.     freopen("output.txt", "w", stdout);
  14. }
  15. void Fast()
  16. {
  17.     ios::sync_with_stdio(false);
  18.     cin.tie(NULL);
  19. }
  20. // ============ MAIN SOLUTION ============
  21. void solve(){
  22.     int a , b;
  23.      cin >> a >> b;
  24.     // is there 1 --> 1
  25.     ll sum = 0;
  26.     for(int bit = 0 ; bit < 32 ; bit++){
  27.         int bit_a = (a & (1ll << bit));
  28.         int bit_b = (b & (1ll << bit));
  29.         if (bit_a && bit_b){
  30.             sum += (1ll << bit);
  31.         }
  32.     }
  33.     // not sum will be the x
  34.     cout << (a ^ sum) + (b ^ sum) << ln;
  35. }
  36. int main()
  37. {
  38.      Fast();
  39.      //Read(); // Command it When Submit in CodeForces
  40.     int t = 1;
  41.     cin >> t;
  42.     while (t--)
  43.     {
  44.         solve();
  45.     }
  46.     return 0;
  47. }
Success #stdin #stdout 0s 5316KB
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https://ideone.com/PnzLeS
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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