제출 #1141459

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1141459		Zheing	Easter Eggs (info1cup17_eastereggs)	C++20	0 / 100	396 ms	196608 KiB

eastereggs

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

using namespace std;

int timer = 0;
vector<int> tour;
vector<vector<int>> graph;

void euler(int at, int prev) {
    tour.push_back(at);
    for (auto v : graph[at]) {
        if (v != prev) euler(v, at);
    }
}

int findEgg(int N, vector<pair<int, int>> bridges) {
    graph.resize(N + 1);
    for (auto e : bridges) {
        graph[e.first].push_back(e.second);
        graph[e.second].push_back(e.first);
    }
    euler(1, -1); 
    int l = 0, r = N - 1;
    while (l < r) {
        int mid = (l + r + 1) / 2;
        if (query(vector<int>(tour.begin(), tour.begin() + mid)) == 1) {
            r = mid - 1;
        } else {
            l = mid;
        }
    }
    return tour[r];
}

• Subtask 1: 0 / 40
• Subtask 2: 0 / 40
• Subtask 3: 0 / 20