제출 #1189949

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1189949		racha555	Easter Eggs (info1cup17_eastereggs)	C++20	100 / 100	11 ms	1052 KiB

eastereggs

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

using namespace std;

void dfs(int u, vector<vector<int>> &adj, vector<vector<int>> &path, vector<bool> &visit)
{
    path[0].emplace_back(u);
    path[path[0].size()] = path[0];
    visit[u] = true;
    for (auto v : adj[u])
    {
        if ((visit[v] == false))
        {

            dfs(v, adj, path, visit);
        } 
    }
}

int findEgg(int N, vector<pair<int, int>> bridges)
{
    vector<vector<int>> adj(515), path(515);
    vector<bool> visit(513, false);
    for (auto [u, v] : bridges)
    {
        adj[u].emplace_back(v);
        adj[v].emplace_back(u);
    }
    dfs(1, adj, path, visit);

    path[0].emplace_back(1);
    int l = 1, mid, r = N;
    // for (int i = 0; i <= N; i++)
    // {
    //     for (auto v : path[i])
    //     {
    //         cout << v << " ";
    //     }
    //     cout << "\n";
    // }
    while (l < r)
    {
        int mid = l + (r - l) / 2;
        if (query(path[mid]) == 1)
        {
            r = mid;
        }
        else
        {
            l = mid + 1;
        }
    }
    return path[r].back();
    // if (query ({1})) return 1;
    // return N;
}
// int main()
// {
//     cout << findEgg(5, {{1, 2}, {1, 3}, {2, 4}, {4, 5}});
// }

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