제출 #1031300

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1031300		ArthuroWich	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	16 ms	600 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
using namespace std;
int n;
vector<int> adj[555], arr;
void dfs(int i, int p) {
    arr.push_back(i);
    for (int j : adj[i]) {
        if (j == p) {
            continue;
        }
        dfs(j, i);
    }
}
int findEgg (int N, vector<pair<int, int>> bridges) {
    int n = N;
    for (int i = 1; i <= n; i++) {
        adj[i].clear();
    }
    arr.clear();
    for (auto [a, b] : bridges) {
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    int l = 1, r = n;
    dfs(1, -1);
    while(l < r) {
        int m = (l+r)/2;
        vector<int> b;
        for (int i = 0; i < m; i++) {
            b.push_back(arr[i]);
        }
        if (query(b)) {
            r = m;
        } else {
            l = m+1;
        }
    }
    return arr[l-1];
}

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