#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
const int MAX_N = 20;
bitset<MAX_N> bs1,bs2,bs3;

// naive ? uso ?
int main() {

  int n;
  cin >> n;
  vector<int> a(n);
  for(int i=0;i<n;++i) cin >> a[i];
  int q;
  cin >> q;
  int ansi = 0;
  while(q--) {
    int l, r;
    cin >> l >> r;
    l ^= ansi;
    r ^= ansi;

    for(int i=l-1;i<r;++i) {
      int v = a[i];
      if(v >= r-l) continue;
      if(bs2[v]) bs3.set(v);
      if(bs1[v]) bs2.set(v);
      bs1.set(v);
    }
    
    int mex1=0,mex2=0,mex3=0;
    for(int i=0;bs1[i];++i) mex1++;
    for(int i=0;bs2[i];++i) mex2++;
    for(int i=0;bs3[i];++i) mex3++;

    for(int i=0;i<r-l;++i) {
      bs1.reset(i);bs2.reset(i);bs3.reset(i);
    }

    ansi = mex1+mex2+mex3;
    if(mex3==0) ansi=min(ansi, r-l);
    if(mex2==0) ansi=min(ansi, r-l-1);
    cout << ansi << endl;
  }
}