제출 #676696

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
676696		LucaLucaM	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	21 ms	368 KiB

eastereggs

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

using namespace std;
vector<int>v[513];
vector<int>order;

void dfs (int x, int par)
{
    order.push_back(x);
    for (int i : v[x])
    {
        if (i == par)
            continue;
        dfs(i, x);
    }
}

int findEgg(int N, vector < pair < int, int > > bridges)
{
    for (pair<int, int>p : bridges)
    {
        v[p.first].push_back(p.second);
        v[p.second].push_back(p.first);
    }

    dfs(1, -1);

    int l=1, r=N;
    while (l < r)
    {
        int mid = (l + r) / 2;

        vector<int>curr;
        for (int i=0; i<mid; i++)
            curr.push_back(order[i]);

        if (query(curr))
            r = mid;
        else
            l = mid + 1;
    }
    
    int ret = order[r-1];
    for (int i=1; i<=N; i++)
        v[i].clear();
    order.clear();
    return ret;
}

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