Submission #874293

#	Time	Username	Problem	Language	Result	Execution time	Memory
874293		asli_bg	Easter Eggs (info1cup17_eastereggs)	C++11	100 / 100	11 ms	1240 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
using namespace std;

vector<int> ord;
vector<int> adjlist[550];

void dfs(int i=1, int r=0){
    ord.push_back(i);
    for(auto komsu:adjlist[i]){
        if(komsu!=r){
            dfs(komsu,i);
        }
    }
}

int findEgg (int N, vector < pair < int, int > > bridges)
{

    for(int i=1;i<=N;i++){
        adjlist[i].clear();
    }

    ord.clear();

    for(auto el:bridges){
        int a=el.first;
        int b=el.second;
        adjlist[a].push_back(b);
        adjlist[b].push_back(a);
    }

    dfs();

    int l=0;
    int r=N-1;

    while(l<r){
        int mid=(l+r+1)/2;
        if(query(vector<int>(ord.begin(),ord.begin()+mid))) r=mid-1;
        else l=mid; 
    }

    return ord[l];
}

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