Submission #524233

#	Time	Username	Problem	Language	Result	Execution time	Memory
524233		CSQ31	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	20 ms	360 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
using namespace std;

vector<int>adj[1000],a;
void dfs(int v,int u){
	a.push_back(v);
	for(int x:adj[v]){
		if(x==u)continue;
		dfs(x,v);
	}
}
int findEgg (int n, vector < pair < int, int > > bridges)
{
	a.clear();
	for(int i=1;i<=n;i++)adj[i].clear();
	for(auto x:bridges){
		adj[x.first].push_back(x.second);
		adj[x.second].push_back(x.first);
	}
	dfs(1,0);
	int l = 0,r = n-1;
	while(r>l){
		int mid = (l+r)/2;
		vector<int>b;
		for(int i=0;i<=mid;i++)b.push_back(a[i]);
		if(query(b))r=mid;
		else l=mid+1;
	}
	return a[r];
}

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