This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "chameleon.h"
#include <bits/stdc++.h>
using namespace std;
int n;
const int N=1005;
vector <int> vt[N];
bool fee[N];
vector <int> cnt[2];
bool f[N];
void dfs(int u,bool ok)
{
cnt[ok].push_back(u);
f[u]=1;
for (auto v:vt[u])
{
if (f[v]==1)
{
continue;
}
dfs(v,1-ok);
}
}
int stl[N];
int ans[N];
void solvea(vector <int >targeta,int id)
{
int left=0;
int right=targeta.size()-1;
while (left<=right)
{
vector <int> tmp;
for (int i=left; i<=right; i++)
{
tmp.push_back(targeta[i]);
}
tmp.push_back(id);
if (Query(tmp)==int(tmp.size()))
{
break;
}
int lefta=left;
int righta=right;
int lmao;
while (lefta<=righta)
{
int mid=(lefta+righta)/2;
vector <int> res;
for (int i=lefta; i<=mid; i++)
{
res.push_back(targeta[i]);
}
res.push_back(id);
if (Query(res)<int(res.size()))
{
lmao=mid;
righta=mid-1;
}
else lefta=mid+1;
}
vt[id].push_back(targeta[lmao]);
vt[targeta[lmao]].push_back(id);
left=lmao+1;
}
}
void Solve(int N)
{
n=N;
for (int i=1; i<=n*2; i++)
{
fee[i]=0;
}
vector <int> targeta,targetb;
while (true)
{
int id=-1;
for (int i=1; i<=n*2; i++)
{
if (fee[i]==0)
{
id=i;
break;
}
}
if (id==-1)
{
break;
}
fee[id]=1;
solvea(targeta,id);
solvea(targetb,id);
for (int i=1; i<=n*2; i++)
{
f[i]=0;
}
cnt[0].clear();
cnt[1].clear();
for (int i=1; i<=n*2; i++)
{
if (f[i]==0&&fee[i]==1)
{
dfs(i,0);
}
}
swap(targeta,cnt[0]);
swap(targetb,cnt[1]);
}
#define pb push_back
for (int i=1;i<=2*n;i++)
{
if (vt[i].size()==3)
{
vector <int> opt1,opt2;
opt1.pb(i);opt1.pb(vt[i][0]);opt1.pb(vt[i][1]);
opt2.pb(i);opt2.pb(vt[i][0]);opt2.pb(vt[i][2]);
if (Query(opt1)==1)
{
stl[i]=vt[i][2];
}
else if (Query(opt2)==1)
{
stl[i]=vt[i][1];
}
else stl[i]=vt[i][0];
}
else
{
ans[i]=vt[i][0];
}
}
for (int i=1;i<=2*n;i++)
{
if (vt[i].size()==3)
{
int id;
for (auto v:vt[i])
{
if (stl[v]==i||stl[i]==v)
{
continue;
}
id=v;
}
ans[i]=id;
}
}
for (int i=1;i<=2*n;i++)
{
if (i<ans[i])
{
Answer(i,ans[i]);
}
}
}
Compilation message (stderr)
chameleon.cpp: In function 'void solvea(std::vector<int>, int)':
chameleon.cpp:65:13: warning: 'lmao' may be used uninitialized in this function [-Wmaybe-uninitialized]
65 | left=lmao+1;
| ~~~~^~~~~~~
chameleon.cpp: In function 'void Solve(int)':
chameleon.cpp:146:19: warning: 'id' may be used uninitialized in this function [-Wmaybe-uninitialized]
146 | ans[i]=id;
| ~~~~~~^~~
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