제출 #1365961

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1365961		Nxmkxing	Easter Eggs (info1cup17_eastereggs)	C++20	100 / 100	6 ms	516 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
using namespace std;

using pii = pair<int, int>;

const int N = 600;
int n;
vector<int> orders, adj[N];

void dfs(int u, int p) {
    orders.push_back(u);
    for (int v : adj[u]) {
        if (v != p) dfs(v, u);
    }
}

int findEgg (int N, vector<pair<int, int>> bridges) {
    n = N;
    orders.clear();
    for (int i = 1; i <= n; i++) adj[i].clear();
    for (auto [u, v] : bridges) {
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    dfs(1, -1);
    int l = 0, r = n - 1;
    while (l < r) {
        int mid = (l + r) / 2;
        vector<int> islands;
        for (int i = 0; i <= mid; i++) islands.push_back(orders[i]);
        if (query(islands)) {
            r = mid;
        }
        else {
            l = mid + 1;
        }
    }
    return orders[l];
}

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