XOR

input/code.cpp: In function 'void insert(int)':
input/code.cpp:19:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(auto it: qq)if(it!=v)add(it^v);
                          ^

#include <iostream>
#include <set>
#include <vector>
#include <bitset>
using namespace std;
typedef unsigned u32;
vector<u32> a[20];
vector<u32> qq;
bitset<1<<20> b;
bool add(int v){
  //cout<<v<<'\n';
  if(b[v]){b.set(0);return true;}
  b.set(v);
  qq.push_back(v);
  return false;
}
void insert(int v){
  if(add(v))return;
  for(auto it: qq)if(it!=v)add(it^v);
}
void query(int v){
  cout<<(b[v]?"YES\n":"NO\n");
}
int main(){
  int q;
  qq.reserve(1<<20);
  cin>>q;
  while(q--){
    int v;
    int op;
    cin>>op>>v;
    if(op == 1) insert(v);
    else query(v);
  }
  return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED

Test 20

Verdict: ACCEPTED

Test 21

Verdict: ACCEPTED

Test 22

Verdict: ACCEPTED

Test 23

Verdict: ACCEPTED

Test 24

Verdict: ACCEPTED

Test 25

Verdict: ACCEPTED

Test 26

Verdict: ACCEPTED

Test 27

Verdict: ACCEPTED

Test 28

Verdict: ACCEPTED

Test 29

Verdict: ACCEPTED

Test 30

Verdict: ACCEPTED

Test 31

Verdict: ACCEPTED

Test 32

Verdict: ACCEPTED