제출 #742781

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
742781		Abrar_Al_Samit	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	16 ms	380 KiB

eastereggs

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

using namespace std;

const int nax = 513;
vector<int>g[nax];
vector<int>order;

void dfs(int v, int p = 0) {
    order.push_back(v);
    for(int u : g[v]) if(u!=p) {
        dfs(u, v);
    }
}
int findEgg (int N, vector<pair<int,int>>bridges) {
    for(int i=1; i<=N; ++i) {
        g[i].clear();
    }
    order.clear();
    
    for(int i=1; i<N; ++i) {
        auto [u, v] = bridges[i-1];
        g[u].push_back(v);
        g[v].push_back(u);
    }

    dfs(1);

    int lo = 0, hi = N;

    while(lo<hi-1) {
        int mid = (lo+hi)/2;

        vector<int>Qset;
        for(int i=0; i<mid; ++i) {
            Qset.push_back(order[i]);
        }
        if(query(Qset)) {
            hi = mid;
        } else {
            lo = mid;
        }
    }
    return order[lo];
}

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