제출 #1029634

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1029634		coolboy19521	Easter Eggs (info1cup17_eastereggs)	C++17	87 / 100	12 ms	856 KiB

eastereggs

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

using namespace std;

const int sz = 600;

vector<int> aj[sz];
vector<int> pt;

void dfs(int v, int p = -1) {
    pt.push_back(v);
    for (int u : aj[v]) if (u != p)
        dfs(u, v);
}

int findEgg (int N, vector < pair < int, int > > bridges)
{
    for (int i = 1; i <= N; i ++)
        aj[i].clear();

    pt.clear();

    for (auto& [v, u] : bridges) {
        aj[v].push_back(u);
        aj[u].push_back(v);
    }

    dfs(1);

    int le = 0, ri = N + 1;

    while (1 < ri - le) {
        int mi = le + (ri - le) / 2;
        vector<int> q;
        for (int i = 1; i <= mi; i ++)
            q.push_back(pt[i - 1]);
        int r = query(q);
        if (r) ri = mi;
        else le = mi;
    }

    return pt[ri - 1];
}

• Subtask 1: 32 / 40
• Subtask 2: 40 / 40
• Subtask 3: 15 / 20