이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include "fun.h"
#include <bits/stdc++.h>
using namespace std;
#define all(x) x.begin(),x.end()
const int N=200005;
int cntid=0;
vector<int> adj[N],sz(N,1),pa(N),ans,dis(N);
priority_queue<pair<int,int>> pq[3];
void dfs(int k){
for(int j:adj[k]){
if(j==pa[k])continue;
pa[j]=k;
dfs(j);
sz[k]+=sz[j];
}
}
int cen(int k,int need){
for(int j:adj[k]){
if(j==pa[k])continue;
if(sz[j]>=need)return cen(j,need);
}
return k;
}
void dfs1(int k,int pa){
pq[cntid].push({dis[k],k});
for(int j:adj[k]){
if(j==pa)continue;
dis[j]=dis[k]+1;
dfs1(j,k);
}
}
vector<int> createFunTour(int n, int q) {
//int H = hoursRequired(0, N - 1);
//int A = attractionsBehind(0, N - 1);
for(int i=0;i<n;i++){
for(int j=i+1;j<n;j++){
if(hoursRequired(i,j)==1){
adj[i].push_back(j);
adj[j].push_back(i);
}
}
}
dfs(0);
int c1=cen(0,(n+1)/2);
for(int j:adj[c1]){
dfs1(j,c1);
cntid++;
}
int last=-1;
for(int i=1;i<n;i++){
pair<int,int> p={-1,-1};
for(int j=0;j<cntid;j++){
if(j==last||pq[j].size()==0)continue;
p=max(p,make_pair(pq[j].top().first,j));
}
last=p.second;
auto [dis1,idx]=pq[p.second].top();
pq[p.second].pop();
ans.push_back(idx);
}
ans.push_back(c1);
/*for(int j:ans){
cout<<j<<' ';
}
cout<<endl;*/
return ans;
}
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