oj.uz

답안 #110178

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
110178 2019-05-09T19:14:51 Z Arturgo 꿈 (IOI13_dreaming) C++14
0 / 100
 63 ms 15896 KB 
#include "dreaming.h"
#include <vector>
#include <algorithm>
#include <iostream>
using namespace std;

vector<pair<int, int>> voisins[100 * 1000];
bool estPasse[100 * 1000];

int diamDeb, diamFin, diamTaille = 0;

pair<int, int> calcDiam(int noeud, int parent = -1) {
  estPasse[noeud] = true;
  pair<int, int> melFeuille = {noeud, 0};

  for(pair<int, int> voisin : voisins[noeud]) {
    if(voisin.first == parent)
      continue;
    pair<int, int> resFeuille = calcDiam(voisin.first, noeud);
    resFeuille.second += voisin.second;

    if(resFeuille.second + melFeuille.second >= diamTaille) {
      diamTaille = resFeuille.second + melFeuille.second;
      diamDeb = resFeuille.first;
      diamFin = melFeuille.first;
    }

    if(resFeuille.second > melFeuille.second) {
      melFeuille = resFeuille;
    }
  }
  
  return melFeuille;
}

bool calcChemin(int deb, int fin, vector<int>& chemin, int parent = -1) {
  if(deb == fin)
    return true;
  for(pair<int, int> voisin : voisins[deb]) {
    if(voisin.first == parent)
      continue;

    if(calcChemin(voisin.first, fin, chemin, deb)) {
      chemin.push_back(voisin.second);
      return true;
    }
  }
  return false;
}

int travelTime(int nbVilles, int nbRoutes, int nouvTaille, int debs[], int fins[], int temps[]) {
  for(int iRoute = 0;iRoute < nbRoutes;iRoute++) {
    voisins[debs[iRoute]].push_back({fins[iRoute], temps[iRoute]});
    voisins[fins[iRoute]].push_back({debs[iRoute], temps[iRoute]});
  }

  vector<int> rayons;
  for(int iVille = 0;iVille < nbVilles;iVille++) {
    if(estPasse[iVille])
      continue;
    
    diamTaille = 0;
    diamDeb = diamFin = iVille;
    calcDiam(iVille);

    vector<int> chemin;
    calcChemin(diamDeb, diamFin, chemin);

    int somme = 0;
    int rayon = 1000 * 1000 * 1000;
    for(int val : chemin) {
      somme += val;
      rayon = min(rayon, max(somme, diamTaille - somme));
    }

    rayons.push_back(-rayon);
  }

  sort(rayons.begin(), rayons.end());

  if(rayons.size() == 1)
    return -rayons[0];

  if(rayons.size() == 2) {
    return nouvTaille - rayons[0] - rayons[1];
  }
  
  return max(nouvTaille - rayons[0] - rayons[1], 2 * nouvTaille - rayons[1] - rayons[2]);
}

Subtask #1
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 63 ms 15896 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 63 ms 15896 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 63 ms 15896 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 26 ms 5476 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 63 ms 15896 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 63 ms 15896 KB Output isn't correct
2 Halted 0 ms 0 KB -