제출 #668643

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
668643		Truitadepatates	Easter Eggs (info1cup17_eastereggs)	C++14	0 / 100	205 ms	131072 KiB

eastereggs

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

vector<vector<int>> adj;
vector<int> ordre;

void dfs(int actual, int anterior){
  ordre.push_back(actual);
  for (auto v : adj[actual]){
    if (v != anterior){
      dfs(v, actual);
    }
  }
}

int findEgg (int N, vector<pair<int, int>> bridges){
  adj.resize(N+1);
  for(int i = 0; i < N-1; i++){
	adj[bridges[i].first].push_back(bridges[i].second);
    adj[bridges[i].second].push_back(bridges[i].first);
  }
  dfs(1, 0);
  int r = N-1, l = 1;
  vector<int> islands;
  while (r >= l){
    int m = (r+l)/2;
    islands.resize(m);
    for (int i = 0; i < m; i++){
      islands[i] = ordre[i];
    }
    if (query(islands)){
      r = m-1;
    }
    else{
      l = m+1;
    }
  }
  return ordre[r+1];
}

• Subtask 1: 0 / 40
• Subtask 2: 0 / 40
• Subtask 3: 0 / 20