Submission #966000

#	Time	Username	Problem	Language	Result	Execution time	Memory
966000		Darren0724	Fun Tour (APIO20_fun)	C++17	47 / 100	108 ms	21100 KiB

fun

#include "fun.h"
#include <bits/stdc++.h>
using namespace std;
#define all(x) x.begin(),x.end()
const int N=200005;
int cntid=0;
const int INF=1e9;
vector<int> sz(N,1),pa(N),ans,dis(N);
priority_queue<pair<int,int>> pq[3];
vector<int> createFunTour(int n, int q) {
  	//int H = hoursRequired(0, N - 1);
  	//int A = attractionsBehind(0, N - 1);
	int c1=0;
	int need=(n+1)/2;
	int mn=INF;
	for(int i=1;i<n;i++){
		int t=attractionsBehind(0, i);
		if(t>=need&&t<mn){
			mn=t;
			c1=i;
		}
	}
	vector<int> r;

	vector<int> dis0(N,0);
	for(int i=0;i<n;i++){
		dis0[i]=hoursRequired(c1,i);
		if(dis0[i]==1){
			r.push_back(i);
		}
	}
	vector<vector<int>> dis(r.size()-1,vector<int>(N));
	vector<int> vis(N);
	for(int i=0;i<r.size()-1;i++){
		for(int j=0;j<n;j++){
			dis[i][j]=hoursRequired(r[i],j);
		}
	}
	for(int i=0;i<n;i++){
		if(i==c1)continue;
		int p=-1;
		for(int j=0;j<r.size()-1;j++){
			if(dis[j][i]<dis0[i]){
				p=j;break;
			}
		}
		if(p==-1)p=r.size()-1;
		pq[p].push({dis0[i],i});
	}
	cntid=r.size();
	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;
		if(pq[last].size()==0)while(1){}
		auto [dis1,idx]=pq[last].top();
		pq[last].pop();
		ans.push_back(idx);
	}
	ans.push_back(c1);
	/*for(int j:ans){
		cout<<j<<' ';
	}
	cout<<endl;*/
  	return ans;
}

Compilation message (stderr)

fun.cpp: In function 'std::vector<int> createFunTour(int, int)':
fun.cpp:34:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |  for(int i=0;i<r.size()-1;i++){
      |              ~^~~~~~~~~~~
fun.cpp:42:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |   for(int j=0;j<r.size()-1;j++){
      |               ~^~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 16 / 16
• Subtask 3: 21 / 21
• Subtask 4: 0 / 19
• Subtask 5: 0 / 34