Submission #68266

#	Time	Username	Problem	Language	Result	Execution time	Memory
68266		AdrienVannson	Cultivation (JOI17_cultivation)	C++14	5 / 100	5 ms	812 KiB

cultivation

// Sous-tâche 1

#include <algorithm>
#include <iostream>
#include <cstdio>
#include <array>

using namespace std;

const int oo = 1000*1000*1000;

const int NB_MAX_LIGNES = 4;
const int NB_MAX_COLONNES = 4;

const int NB_DIRECTIONS = 4;
const int DELTAS_DIRECTIONS[NB_DIRECTIONS][2] = {
    {0, 1},
    {1, 0},
    {0, -1},
    {-1, 0}
};

int nbLignes, nbColonnes;


int getNbActionsMin (const array<array<bool, NB_MAX_COLONNES>, NB_MAX_LIGNES> &estPlein)
{
    bool estValide = true;

    for (int iLigne=0; iLigne<nbLignes; iLigne++) {
        for (int iColonne=0; iColonne<nbColonnes; iColonne++) {
            if (!estPlein[iLigne][iColonne]) {
                estValide = false;
            }
        }
    }

    if (estValide) {
        return 0;
    }


    int res = +oo;

    for (int iDirection=0; iDirection<NB_DIRECTIONS; iDirection++) {
        auto nouveauEstPlein = estPlein;

        for (int iLigne=0; iLigne<nbLignes; iLigne++) {
            for (int iColonne=0; iColonne<nbColonnes; iColonne++) {

                if (!estPlein[iLigne][iColonne]) {
                    continue;
                }

                const int iNouvelleLigne = iLigne + DELTAS_DIRECTIONS[iDirection][0];
                const int iNouvelleColonne = iColonne + DELTAS_DIRECTIONS[iDirection][1];

                if (iNouvelleLigne < 0 || iNouvelleLigne >= nbLignes || iNouvelleColonne < 0 || iNouvelleColonne >= nbColonnes) {
                    continue;
                }

                nouveauEstPlein[iNouvelleLigne][iNouvelleColonne] = true;
            }
        }

        if (nouveauEstPlein != estPlein) {
            res = min(getNbActionsMin(nouveauEstPlein) + 1, res);
        }
    }

    return res;
}


int main ()
{
    scanf("%d %d", &nbLignes, &nbColonnes);

    if (nbLignes > NB_MAX_LIGNES || nbColonnes > NB_MAX_COLONNES) {
        printf("%d\n", 1/0);
        return 0;
    }

    array<array<bool, NB_MAX_COLONNES>, NB_MAX_LIGNES> estPlein;

    for (int iLigne=0; iLigne<nbLignes; iLigne++) {
        for (int iColonne=0; iColonne<nbColonnes; iColonne++) {
            estPlein[iLigne][iColonne] = false;
        }
    }

    int nbCellulesPleines;
    scanf("%d", &nbCellulesPleines);

    for (int iCellule=0; iCellule<nbCellulesPleines; iCellule++) {
        int iLigne, iColonne;
        scanf("%d %d", &iLigne, &iColonne);
        iLigne--, iColonne--;

        estPlein[iLigne][iColonne] = true;
    }

    printf("%d\n", getNbActionsMin(estPlein));

    return 0;
}

Compilation message (stderr)

cultivation.cpp: In function 'int main()':
cultivation.cpp:80:25: warning: division by zero [-Wdiv-by-zero]
         printf("%d\n", 1/0);
                        ~^~
cultivation.cpp:77:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &nbLignes, &nbColonnes);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cultivation.cpp:93:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &nbCellulesPleines);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
cultivation.cpp:97:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &iLigne, &iColonne);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 30
• Subtask 5: 0 / 20
• Subtask 6: 0 / 20