제출 #766239

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
766239		Ahmed57	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	16 ms	360 KiB

eastereggs

#include "grader.h"

#include <bits/stdc++.h>

using namespace std;
int findEgg(int N, vector < pair < int, int > > bridges){
    queue<int> q;
    vector<int> adj[N+1];
    for(auto i:bridges){
        adj[i.first].push_back(i.second);
        adj[i.second].push_back(i.first);
    }
    q.push(1);
    int vis[N+1] = {0};
    vis[1] = 1;
    vector<int> lol;
    while(!q.empty()){
        int x= q.front();
        lol.push_back(x);
        q.pop();
        for(auto j:adj[x]){
            if(!vis[j]){
                q.push(j);vis[j] = 1;
            }
        }
    }
    int l = 1 , r = N-1 , ans = lol[N-1];
    while(l<=r){
        int mid = (l+r)/2;
        vector<int> xd;
        for(int i =0;i<mid;i++){
            xd.push_back(lol[i]);
        }
        if(query(xd)){
            ans = lol[mid-1];
            r = mid-1;
        }else l = mid+1;
    }
    return ans;
}

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