Submission #116003

#	Time	Username	Problem	Language	Result	Execution time	Memory
116003		ntrung03	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	29 ms	384 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"

using namespace std;
vector<int> tour;
vector<vector<int>> adj;
void dfs(int u,int e){
	tour.push_back(u);
	for(auto v:adj[u])
	if(v!=e) dfs(v,u);
}
int findEgg (int N, vector < pair < int, int > > bridges)
{
	tour.clear();
	tour.push_back(0);
	adj.clear();
	adj.resize(N+1);
	for(auto e:bridges){
		adj[e.first].push_back(e.second);
		adj[e.second].push_back(e.first);
	}
	dfs(1,-1);
	int r = 0;
	for(int i=log2(N);i>=0;i--){
		int t = r|(1<<i);
		if(t>=N) continue;
		vector<int> q(next(tour.begin()),next(tour.begin(),t+1));
//		cout<<t<<endl;
		if(!query(q)) r=t;
	}
//	cout<<tour[r]<<endl;
	return tour[r+1];
}

• Subtask 1: 40 / 40
• Subtask 2: 40 / 40
• Subtask 3: 20 / 20