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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int b[32];
  6. int sz = 0;
  7.  
  8. void add(int x)
  9. {
  10.     for(int i = 0; i < sz; i++)
  11.         if((x ^ b[i]) < x)
  12.             x ^= b[i];
  13.     for(int i = 0; i < sz; i++)
  14.         if((x ^ b[i]) < b[i])
  15.             b[i] ^= x;
  16.     if(x)
  17.     {
  18.         b[sz++] = x;
  19.         for(int i = sz - 1; i; i--)
  20.             if(b[i] < b[i - 1])
  21.                 swap(b[i], b[i - 1]);
  22.     }
  23. }
  24.  
  25. int get(int k)
  26. {
  27.     k--;
  28.     int ans = 0;
  29.     for(int i = 0; i < sz; i++)
  30.         if((k >> i) & 1)
  31.             ans ^= b[i];
  32.     return ans;
  33. }
  34.  
  35. int main()
  36. {
  37.     ios::sync_with_stdio(0);
  38.     cin.tie(0);
  39.     int n;
  40.     cin >> n;
  41.     while(n--)
  42.     {
  43.         int t, x;
  44.         cin >> t >> x;
  45.         if(t == 1)
  46.             add(x);
  47.         else
  48.             cout << get(x) << "\n";
  49.     }
  50. }
Runtime error #stdin #stdout 0s 3456KB
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https://ideone.com/LLtY4q
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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