Submission #918058

#	Time	Username	Problem	Language	Result	Execution time	Memory
918058		aykhn	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	13 ms	1256 KiB

eastereggs

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

using namespace std;

vector<int> e;
vector<int> adj[600];

void dfs(int a, int p)
{
    e.push_back(a);
    for (int v : adj[a])
    {
        if (v == p) continue;
        dfs(v, a);
    }
}

int findEgg (int N, vector < pair < int, int > > bridges)
{
  e.clear();
    for (int i = 0; i <= N; i++) adj[i].clear();
    for (pair<int, int> p : bridges)
    {
        adj[p.first].push_back(p.second);
        adj[p.second].push_back(p.first);
    }
    dfs(1, 1);
    int l = 0;
    int r = e.size() - 1;
    while (l < r)
    {
        int mid = (l + r) >> 1;
        vector<int> nw;
        for (int i = 0; i <= mid; i++) nw.push_back(e[i]);
        if (query(nw)) r = mid;
        else l = mid + 1;
    }
    return e[l];
}

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