#include "Anna.h"
#include<bits/stdc++.h>
using namespace std;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
namespace {
  int n, l, r, ile;
  vector<int>pos;
  vector<bool>bits;
  void check() {
    ++ile;
    int a=0, b=0;
    rep(i, 20) if(bits[i]) a|=1<<i;
    rep(i, 20) if(bits[i+20]) b|=1<<i;
    vector<int>tmp;
    bool zawiera=true;
    rep(i, pos.size()) if((i<a || i>b) && (l<=pos[i] && pos[i]<=r)) zawiera=false;
    if(zawiera) {
      SendA(1); 
      rep(i, pos.size()) if(pos[a]<=pos[i] && pos[i]<=pos[b]) tmp.pb(pos[i]);
    } else {
      SendA(0);
      rep(i, pos.size()) if(pos[a]>pos[i] || pos[i]>pos[b]) tmp.pb(pos[i]);
    }
    pos=tmp;
    bits.clear();
  }
}
void InitA(int _N, int _L, int _R) {
  n=_N; l=_L; r=_R; 
  ile=0;
  pos.clear();
  bits.clear();
  rep(i, n) pos.pb(i);
}
void ReceiveA(bool x) {
  bits.pb(x);
  if(bits.size()==40 && ile<18) check();
}
int Answer() {
  vector<int>T;
  rep(i, pos.size()) {
    int x=0;
    rep(j, 20) if(bits[i*20+j]) x|=1<<j;
    T.pb(x);
  }
  pair<int,int>mi={n, n};
  rep(i, pos.size()) if(l<=pos[i] && pos[i]<=r) mi=min(mi, {T[i], pos[i]});
  return mi.nd;
}

#include "Bruno.h"
#include<bits/stdc++.h>
using namespace std;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
namespace {
  const int LIM=1e6+7;
  int lewo[LIM], prawo[LIM], odw[LIM], n, ile;
  pair<int,int>xd;
  vector<int>T, pos;
  void send() {
    int m=pos.size();
    vector<pair<int,int>>P, S;
    rep(i, m) {
      lewo[i]=prawo[i]=i;
      odw[i]=0;
      P.pb({T[pos[i]], i});
    }
    sort(all(P));
    reverse(all(P));
    for(auto i : P) {
      int l=i.nd, r=i.nd;
      if(l && odw[l-1]) {
        lewo[r]=lewo[l-1];
        prawo[lewo[r]]=r;
        l=lewo[r];
      }
      if(r<m-1 && odw[r+1]) {
        prawo[l]=prawo[r+1];
        lewo[prawo[l]]=l;
        r=prawo[l];
      }
      odw[i.nd]=1;
      S.pb({l, r});
    }
    pair<int,int>mi={LIM, LIM};
    rep(i, m) {
      int d=S[i].nd-S[i].st+1;
      mi=min(mi, {max(d, (int)pos.size()-d), i});
    }
    xd=S[mi.nd];
    rep(i, 20) if(S[mi.nd].st&(1<<i)) SendB(1); else SendB(0);
    rep(i, 20) if(S[mi.nd].nd&(1<<i)) SendB(1); else SendB(0);
  }
}
void InitB(int _N, vector<int>_T) {
  n=_N; ile=0;
  T=_T;
  pos.clear();
  rep(i, n) pos.pb(i);
  send();
}
void ReceiveB(bool y) {
  ++ile;
  vector<int>tmp;
  if(y) {
    rep(i, pos.size()) if(xd.st<=i && i<=xd.nd) tmp.pb(pos[i]);
  } else {
    rep(i, pos.size()) if(xd.st>i || i>xd.nd) tmp.pb(pos[i]);
  }
  pos=tmp;
  if(ile<18) {
    send();
    return;
  }
  rep(i, pos.size()) {
    rep(j, 20) if(T[pos[i]]&(1<<j)) SendB(1); else SendB(0);
  }
}