제출 #890562

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
890562		Iwantbemaster	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	12 ms	1008 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
using namespace std;
int i, cur[1005];
vector<int> result[1005];
void DFS(int res, int ans){
	cur[++i] = res;
	for(auto to : result[res]){
		if(to == ans) continue;
		DFS(to, res);
	}
}
int Query(int res){
	vector<int> v;
	for(int i = 1; i <= res; i++) v.push_back(cur[i]);
	return query(v);
}

int findEgg(int n, vector<pair<int, int>> bridges){
	for(int i = 1; i <= n; i++) result[i].clear();
	for(auto e: bridges){
		result[e.first].push_back(e.second);
		result[e.second].push_back(e.first);
	} i = 0; DFS(1, 0);
	int l = 1, r = n;
	while(l < r){
		int m = l + (r - l) / 2;
		if(Query(m)) r = m;
		else l = m + 1;
	} return cur[l];
}

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