# include <iostream>
# include <vector>
using namespace std;
# include "cave.h"
//# include "grader.c"
const int MAX=5e3+11;
int query(int S[])
{
int resp=tryCombination(S);
if(resp==-1) return 1e9;
else return resp;
}
void exploreCave(int N)
{
int s[5111],d[5111];
for(int i=0;i<N;i++)
{
s[i]=0;
d[i]=-1;
}
for(int i=0;i<N;i++)
{
int resp=query(s);
int l=0,r=N-1,ans=0;
while(l<r)
{
int mid=(l+r)/2;
for(int j=l;j<=mid;j++) if(d[j]==-1) s[j]^=1;
int resp2=query(s),L=i;
if((resp==i and resp2==i) or (resp>i and resp2>i))
{
l=mid+1;
ans=mid+1;
}
else
{
r=mid;
ans=mid;
}
for(int j=L;j<=mid;j++) if(d[j]==-1) s[j]^=1;
}
d[ans]=i;
if(resp==i) s[ans]=1;
}
answer(s,d);
}
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