제출 #447295

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
447295		Aryan_Raina	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	27 ms	364 KiB

eastereggs

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

using namespace std;

int findEgg (int N, vector < pair < int, int > > bridges)
{
    vector<int> g[N];
    for (auto [a, b] : bridges) {
        g[--a].push_back(--b);
        g[b].push_back(a);
    }

    vector<int> A;
    function<void(int,int)> dfs = [&](int u, int pu) {
        A.push_back(u+1);
        for (int v : g[u]) if (v != pu) dfs(v, u);
    };
    dfs(0,0);

    int lo = 0, hi = N-1;
    while (lo < hi) {
        int mid = (lo + hi)/2;
        if (query(vector<int>(A.begin(), A.begin()+mid+1))) hi = mid;
        else lo = mid+1;
    }

    return A[hi];
}

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