#include "cave.h"
#include<bits/stdc++.h>
using namespace std;
//#define int long long
map<int,int> used;
void convert(int (&v)[],int idx, int val){
for(int i = 0; i< idx; i++){
if(used[i]) continue;
v[i] = val;
}
}
void exploreCave(int N) {
/* ... */
int v[N];
for(int i = 0; i<N; i++){
v[i] = 0;
}
int s[N];
// Busco combinacio correcte
for(int i = 0; i<N; i++){
bool ok = 0;
int l = -1; int r = N-1;
int val = 0;
convert(v,N,0);
if(tryCombination(v) == i) val = 1;
while(r > l+1){
int m = (l+r)/2;
convert(v,m,val);
// si s'ha obert,
int x = tryCombination(v);
if (x == -1){
ok = 1; break;
}
if(x == i){
//tancat
l = m;
}
else r = m;
convert(v,m,val^1);
}
if(ok) break;
int prev = v[l];
v[l] = val;
if(!used[l] && tryCombination(v) > i){
used[l] = 1;
}
else{
used[r] = 1;
v[r] = val;
v[l] = prev;
}
}
for(int i = 0; i<N; i++){
v[i] ^= 1;
s[i] = tryCombination(v);
v[i] ^= 1;
}
answer(v,s);
//for(int i = 0; i<N; i++) cout<<v[i]<<" "; cout<<endl;
//for(int i = 0; i<N; i++) cout<<s[i]<<" "; cout<<endl;
return;
}
