Submission #1015722

#	Time	Username	Problem	Language	Result	Execution time	Memory
1015722		inesfi	Thousands Islands (IOI22_islands)	C++17	8.40 / 100	22 ms	8192 KiB

islands

#include "islands.h"
#include <bits/stdc++.h>
#include <variant>

using namespace std; 

const int MAXI = 100*1000; 
vector<int> noeudsAdj[MAXI]; 

const int PAS_VU = 0; 
const int EN_COURS_DE_VISITE = 1; 
const int DEJA_VISITE = 2; 
int noeudVisite[MAXI]; 

bool TrouveCycle(int noeud)
{
   if (noeudVisite[noeud] == DEJA_VISITE)
      return false;
   if (noeudVisite[noeud] == EN_COURS_DE_VISITE)
      return true;
   noeudVisite[noeud] = EN_COURS_DE_VISITE;
   for (int arc = 0; arc < noeudsAdj[noeud].size(); arc++)
      if (TrouveCycle(noeudsAdj[noeud][arc]))
         return true;
   noeudVisite[noeud] = DEJA_VISITE;
   return false;
}

variant<bool, vector<int>> find_journey(
    int N, int M, vector<int> U, vector<int> V) {
    for(int n=0; n<M; n+=2){
      noeudsAdj[U[n]].push_back(V[n]); 
    }
    return TrouveCycle(0);
}

Compilation message (stderr)

islands.cpp: In function 'bool TrouveCycle(int)':
islands.cpp:22:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |    for (int arc = 0; arc < noeudsAdj[noeud].size(); arc++)
      |                      ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 21
• Subtask 4: 8.399999999999999 / 24
• Subtask 5: 0 / 45