Submission #243012

#	Time	Username	Problem	Language	Result	Execution time	Memory
243012		Rainbowbunny	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	27 ms	512 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
#define mp make_pair
#define eb emplace_back
#define fi first
#define se second
using namespace std;
using cd = complex <double>;
 
typedef pair <int, int> pii;
 
const int Inf = 100000;
const int mod = 998244353;
const double Pi = acos(-1);
 
void Fastio()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
}

vector <int> DFSorder;
vector <int> Adj[525];

void DFS(int node, int p = -1)
{
	DFSorder.eb(node);
	for(auto x : Adj[node])
	{
		if(x != p)
		{
			DFS(x, node);
		}
	}
}

int findEgg(int n, vector <pii> bridges)
{
	for(int i = 1; i <= n; i++)
	{
		Adj[i].clear();
	}
	for(auto x : bridges)
	{
		Adj[x.fi].eb(x.se);
		Adj[x.se].eb(x.fi);	
	}
	DFSorder.clear();
	DFS(1);
	int l = 0, r = n - 1;
	while(l < r)
	{
		int mid = (l + r) >> 1;
		vector <int> Ans;
		Ans.clear();
		for(int i = 0; i <= mid; i++)
		{
			Ans.eb(DFSorder[i]);
		}
		if(query(Ans))
		{
			r = mid;
		}
		else
		{
			l = mid + 1;
		}
	}
	return DFSorder[l];
}

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