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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. vector<int> basis;
  6.  
  7. void add(int x)
  8. {
  9.     for(auto &it: basis)
  10.         if((x ^ it) < x)
  11.             x ^= it;
  12.     for(auto &it: basis)
  13.         if((x ^ it) < it)
  14.             it ^= x;
  15.     if(x)
  16.         {basis.push_back(x);
  17.     sort(basis.begin(), basis.end());}
  18. }
  19.  
  20. int get(int k)
  21. {
  22.     k--;
  23.     int ans = 0;
  24.     for(int i = 0; i < basis.size(); i++)
  25.         if((k >> i) & 1)
  26.             ans ^= basis[i];
  27.     return ans;
  28. }
  29.  
  30. int main()
  31. {
  32.     ios::sync_with_stdio(0);
  33.     cin.tie(0);
  34.     int n;
  35.     cin >> n;
  36.     while(n--)
  37.     {
  38.         int t, x;
  39.         cin >> t >> x;
  40.         if(t == 1)
  41.             add(x);
  42.         else
  43.             cout << get(x) << "\n";
  44.     }
  45. }
Runtime error #stdin #stdout 0.01s 3460KB
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https://ideone.com/0KF9Ra
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
secret

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