Submission #1028868

#	Time	Username	Problem	Language	Result	Execution time	Memory
1028868		parsadox2	Simurgh (IOI17_simurgh)	C++17	0 / 100	61 ms	3972 KiB

simurgh

#include "simurgh.h"

#include <bits/stdc++.h>

using namespace std;

const int N = 5e2 + 10;

struct EDGE{
	int to , id;
};

int n , m;
vector <EDGE> adj[N];
vector <int> r;
bool marked[N] , dead[N];

int Find_good(int v)
{
	marked[v] = true;
	for(auto u : adj[v])  if(!marked[u.to])
		return Find_good(u.to);
	return v;
}

void Dfs(int v)
{
	marked[v] = true;
	for(auto u : adj[v])  if(!marked[u.to] && !dead[u.to])
	{
		r.push_back(u.id);
		Dfs(u.to);
	}
}

vector<int> find_roads(int nn, vector<int> u, vector<int> v) {
	n = nn;
	m = u.size();
	for(int i = 0 ; i < m ; i++)
	{
		adj[u[i]].push_back({v[i] , i});
		adj[v[i]].push_back({u[i] , i});
	}
	int star = Find_good(0);
	vector <int> cand;
	dead[star] = true;
	cand.push_back(star);
	vector <int> cor;
	//cout << "STAR " << star << endl;
	while(!cand.empty())
	{
		int mx = 0;
		vector <EDGE> add;
		r = cor;
		for(int i = 0 ; i < n ; i++)
			marked[i] = false;
		for(int i = 0 ; i < n ; i++)  if(!dead[i])
		{
			Dfs(i);
			break;
		}
		for(auto v : cand)  for(auto u : adj[v])  if(!dead[u.to])
		{
			r.push_back(u.id);
			//for(auto u : r)
			//	cout << u << " ";
			//cout << " ? " << endl;
			int now = count_common_roads(r);
			//cout << now << endl;
			if(now > mx)
			{
				mx = now;
				add.clear();
			}
			if(now == mx)
				add.push_back(u);
			r.pop_back();
		}
		cand.clear();
		for(auto u : add)
		{
			cor.push_back(u.id);
			dead[u.to] = true;
			cand.push_back(u.to);
		}
	}
	return cor;
}

• Subtask 1: 0 / 13
• Subtask 2: 0 / 17
• Subtask 3: 0 / 21
• Subtask 4: 0 / 19
• Subtask 5: 0 / 30