Submission #1188331

#	Time	Username	Problem	Language	Result	Execution time	Memory
1188331		peteza	Easter Eggs (info1cup17_eastereggs)	C++20	100 / 100	8 ms	540 KiB

eastereggs

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

vector<int> adj[2005];
vector<int> bruhs;

void dfs(int x, int p = -1) {
    bruhs.push_back(x);
    for(auto &e:adj[x]) {
        if(e == p) continue;
        dfs(e, x);
    }
}

int findEgg (int N, vector < pair < int, int > > bridges) {
    for(int i=0;i<=N;i++) adj[i].clear();
    bruhs.clear();
    for(auto &e:bridges) {adj[e.first].push_back(e.second); adj[e.second].push_back(e.first);} 
    dfs(1);
    int l = 0, r = N-1, mid;
    while(l < r) {
        mid = (l+r) >> 1;
        vector<int> toask;
        for(int i=0;i<=mid;i++) toask.push_back(bruhs[i]);
        if(query(toask)) r = mid;
        else l = mid+1;
    }
    return bruhs[l];
}

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