Submission #867719

#	Time	Username	Problem	Language	Result	Execution time	Memory
867719		ElenaBM	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	13 ms	1240 KiB

eastereggs

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

using namespace std;
void dfs (int act, vector<vector<int>>& adj, vector<int>&li, int ant){
    li.push_back(act);
    for (int conex = 0; conex < (int)adj[act].size(); ++conex){
        if (adj[act][conex] != ant) dfs(adj[act][conex], adj, li, act);
    }
}

int findEgg (int N, vector<pair<int,int>>bridges){
    vector<vector<int>> adj(N, vector<int>());
    for (int i = 0; i < (int)bridges.size(); ++i){
        adj[bridges[i].first - 1].push_back(bridges[i].second - 1);
        adj[bridges[i].second - 1].push_back(bridges[i].first - 1);
    }
    vector<int>li, opt;
    dfs (0, adj, li, 0);
    int r = N-1, l = 0;
    while (l < r){
        int m = (l+r)/2;
        opt.clear();
        for (int i= 0; i <= m; ++i)opt.push_back(li[i] + 1);
        if (query(opt))r = m;
        else l = m + 1;
    }
    return li[l]+ 1; 
}

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