제출 #547312

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
547312		Monarchuwu	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	22 ms	372 KiB

eastereggs

/**
 *  Problem:    info1cup17_eastereggs - Easter Eggs
 *  Link:       https://oj.uz/problem/view/info1cup17_eastereggs
 *  Tags:       Interactive
**/
#include<iostream>
#include<algorithm>
#include<vector>
#include<queue>
#include "grader.h"

using namespace std;

typedef pair<int, int> pii;
#define ff first
#define ss second

const int N = 600;
vector<int> g[N], ord;
void dfs(int u, int p) {
    ord.push_back(u);
    for (int v : g[u])
        if (v != p) dfs(v, u);
}
int findEgg(int n, vector<pii> bridges) {
    for (int i = 1; i <= n; ++i) g[i].clear();
    for (pii e : bridges) {
        g[e.ff].push_back(e.ss);
        g[e.ss].push_back(e.ff);
    }
    ord.clear();
    dfs(1, 0);
    int lo(0), hi(n - 2), m;
    while (lo <= hi) {
        m = (lo + hi) >> 1;
        if (query(vector<int>(ord.begin(), ord.begin() + m + 1)))
            hi = m - 1;
        else lo = m + 1;
    }
    return ord[hi + 1];
}

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