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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define fastio ios::sync_with_stdio(0); cin.tie(nullptr); cout.tie(nullptr);
  4. #define ll long long
  5. #define int ll
  6. const int mxn = (int)2e5+7;
  7. const int MOD = 998244353;
  8. #define isON(n, k) (((n) >> (k)) & 1)
  9.  
  10. void GETAC(){
  11.  
  12.     int n, x, y;
  13.     cin >> n >> x >> y;
  14.     vector<int> A(n), A1, A2;
  15.     for (int& i : A) cin >> i;
  16.     int mid(n / 2);
  17.     for (int msk(0); msk < (1 << mid); ++msk) {
  18.         int xr(0);
  19.         for (int i(0); i < mid; ++i)
  20.             if (isON(msk, i))
  21.                 xr ^= A[i];
  22.  
  23.             A1.emplace_back(xr);
  24.     }
  25.  
  26.     for (int msk(0); msk < (1 << (n - mid)); ++msk) {
  27.         int xr(0);
  28.         for (int i(0); i < n-mid; ++i)
  29.             if (isON(msk, i))
  30.                 xr ^= A[mid + i];
  31.  
  32.             A2.emplace_back(xr);
  33.     }
  34.  
  35.     sort(A1.begin(), A1.end()), sort(A2.begin(), A2.end());
  36.     bool ok_x, ok_y;
  37.     ok_x = ok_y = 0;
  38.     for (int& i : A1) {
  39.         if (!ok_x and binary_search(A2.begin(), A2.end(), x ^ i))
  40.             ok_x = 1;
  41.  
  42.         if (!ok_y and binary_search(A2.begin(), A2.end(), y ^ i))
  43.             ok_y = 1;
  44.  
  45.         if (ok_x and ok_y)
  46.             return void(cout << "YES");
  47.  
  48.     }
  49.     cout << "NO";
  50. }
  51.  
  52. signed main()
  53. {
  54.     fastio
  55.     int t(1); cin >> t;
  56.     while(t--) GETAC(), cout << '\n';
  57. }
Success #stdin #stdout 0.01s 5516KB
comments (?)
stdin 
2
5 1 7
1 2 3 4 5
3 8 9
1 2 3
stdout 
YES
NO
https://ideone.com/fNUnoc
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
secret

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