제출 #1200901

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1200901		BehruzbekX	Easter Eggs (info1cup17_eastereggs)	C++17	0 / 100	0 ms	472 KiB

eastereggs

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

using namespace std;

int findEgg (int N, vector < pair < int, int > > bridges)
{
    vector<vector<int>> a(N);
    for (auto [x, y] : bridges) --x, --y, a[x].emplace_back(y), a[y].emplace_back(x);
    vector<int> g;
    auto dfs = [&](auto &dfs, int v, int p) -> void{
        g.emplace_back(v);
        for (int u : a[v]) if (u != p) dfs(dfs, u, v);
    };  
    dfs(dfs, 0, -1);
    int l = 0, r = g.size() - 1, ans = -1;
    while (l <= r) {
        int mid = (l + r) >> 1;
        if (query(vector<int>(g.begin(), g.begin() + mid))) ans = mid, r = mid - 1;
        else l = mid + 1;
    }
    return ans;
}

• Subtask 1: 0 / 40
• Subtask 2: 0 / 40
• Subtask 3: 0 / 20