제출 #547302

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
547302		Monarchuwu	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	22 ms	356 KiB

eastereggs

// test code USACO Guide, https://usaco.guide/adv/interactive?lang=cpp

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

const int N = 600;
vector<int> graph[513], ord;

void dfs(int node = 1, int parent = 0) {
	ord.push_back(node);
	for (int i : graph[node]) if (i != parent) dfs(i, node);
}

int findEgg(int N, vector<pair<int, int>> bridges) {
	for (int i = 1; i <= N; i++) graph[i].clear();
	ord.clear();
	for (pair<int, int> i : bridges) {
		graph[i.first].push_back(i.second);
		graph[i.second].push_back(i.first);
	}
	dfs();
	int l = 0, r = N - 1;
	while (l != r) {
		int mid = (l + r + 1) / 2;
		if (query(vector<int>(ord.begin(), ord.begin() + mid))) r = mid - 1;
		else l = mid;
	}
	return ord[l];
}

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