#include "mushrooms.h"
#include <bits/stdc++.h>
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
#define all(x) x.begin(),x.end()
#define lun(x) (int)x.size()
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<60);
const int inf=(1<<30);
const int nmax=2e4+50;
const ll mod=1e9+7;
using namespace std;
int i,j,t,x,y,rs,k;
vector<int>a[2],v;
int ask(vector<int> a)
{
return use_machine(a);
}
int count_mushrooms(int n)
{
if(n==2)
{
if(!ask({0,1}))return 2;
return 1;
}
a[0].pb(0);
if(ask({0,1}))a[1].pb(1);
else a[0].pb(1);
if(ask({0,2}))a[1].pb(2);
else a[0].pb(2);
k=90;
for(i=3;i<n;i+=2)
{
if(max(lun(a[0]),lun(a[1]))>=k)break;
v.clear();
for(j=0;j<2;j++)
{
if(lun(a[j])<2)continue;
v.pb(i),v.pb(a[j][0]);
if(i+1<n)v.pb(i+1),v.pb(a[j][1]);
x=ask(v);
if(!x)
{
a[j].pb(i);
if(i+1<n)a[j].pb(i+1);
}
else if(x==1)
{
a[j^1].pb(i);
if(i+1<n)a[j].pb(i+1);
}
else if(x==2)
{
a[j].pb(i);
a[j^1].pb(i+1);
}
else if(x==3)
{
a[j^1].pb(i);
a[j^1].pb(i+1);
}
break;
}
}
rs=lun(a[0]);
for(;i<n;i+=k)
{
v.clear(),y=0;
if(lun(a[0])>=lun(a[1]))k=lun(a[0]),t=0;
else k=lun(a[1]),t=1;
for(j=i;j<min(i+k,n);j++)
{
v.pb(j);
v.pb(a[t][j-i]);
y++;
}
x=ask(v);
if(x&1)a[t^1].pb(i);
else a[t].pb(i);
if(t)rs+=(x+1)/2;
else rs+=y-(x+1)/2;
}
return rs;
}
/*int main()
{
//freopen("sol.in","r",stdin);
//freopen("sol.out","w",stdout);
//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
return 0;
}*/
