oj.uz

Submission #68631

# Submission time Handle Problem Language Result Execution time Memory
68631 2018-08-17T17:53:07 Z AdrienVannson Cultivation (JOI17_cultivation) C++14
5 / 100
 77 ms 720 KB 
// Sous-tâche 1 & 2

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

using namespace std;

const int oo = 1000*1000*1000;

const int TAILLE_MAX_GRILLE_DEPART = 42;

const int TAILLE_MAX = 2 * TAILLE_MAX_GRILLE_DEPART;
const int NB_MAX_LIGNES = TAILLE_MAX;
const int NB_MAX_COLONNES = TAILLE_MAX;



int nbLignes, nbColonnes;
bool estPlein[NB_MAX_LIGNES][NB_MAX_COLONNES];


bool getEstPossible (const int nbBas, const int nbDroite)
{
    int nbRectangles[NB_MAX_LIGNES][NB_MAX_COLONNES];
    fill(*nbRectangles, *nbRectangles+NB_MAX_LIGNES*NB_MAX_COLONNES, 0);

    for (int iLigne=0; iLigne<nbLignes; iLigne++) {
        for (int iColonne=0; iColonne<nbColonnes; iColonne++) {
            if (estPlein[iLigne][iColonne]) {
                nbRectangles[iLigne][iColonne]++;
                nbRectangles[iLigne][iColonne+nbDroite+1]--;
                nbRectangles[iLigne+nbBas+1][iColonne]--;
                nbRectangles[iLigne+nbBas+1][iColonne+nbDroite+1]++;
            }
        }
    }

    // Pour chaque cellule, calculer par combien de rectangles elle est recouverte
    for (int iLigne=0; iLigne<NB_MAX_LIGNES-1; iLigne++) {
        for (int iColonne=0; iColonne<NB_MAX_COLONNES-1; iColonne++) {
            nbRectangles[iLigne][iColonne+1] += nbRectangles[iLigne][iColonne];
            nbRectangles[iLigne+1][iColonne] += nbRectangles[iLigne][iColonne];
            nbRectangles[iLigne+1][iColonne+1] -= nbRectangles[iLigne][iColonne];
        }
    }

    // Pour chaque cellule, calculer le nombre de cellules consecutives à droite
    int nbADroite[NB_MAX_LIGNES];
    fill(nbADroite, nbADroite+NB_MAX_LIGNES, 0);

    for (int iColonne=NB_MAX_COLONNES-1; iColonne>=0; iColonne--) {
        for (int iLigne=0; iLigne<NB_MAX_LIGNES; iLigne++) {

            nbADroite[iLigne]++;

            if (nbRectangles[iLigne][iColonne] == 0) {
                nbADroite[iLigne] = 0;
            }
        }

        // Vérification de la validité sur la colonne actuelle
        int iLigneDebut = -1; // Exclu (sur une cellule invalide)

        for (int iLigneFin=0; iLigneFin<NB_MAX_LIGNES; iLigneFin++) { // Inclus

            if (nbADroite[iLigneFin] < nbColonnes) {
                iLigneDebut = iLigneFin;
            }

            if (iLigneFin - iLigneDebut >= nbLignes) {
                return true;
            }

        }
    }

    return false;
}


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

    if (nbLignes > 40 || nbColonnes > 40) {
        exit(42);
    }


    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;
    }

    int nbEtapesMin = +oo;

    for (int nbEtapesBas=0; nbEtapesBas<TAILLE_MAX_GRILLE_DEPART; nbEtapesBas++) {

        // TODO: dichotomie
        for (int nbEtapesDroite=0; nbEtapesDroite<TAILLE_MAX_GRILLE_DEPART; nbEtapesDroite++) {
            if (getEstPossible(nbEtapesBas, nbEtapesDroite)) {
                nbEtapesMin = min(nbEtapesBas+nbEtapesDroite, nbEtapesMin);
            }
        }
    }

    printf("%d\n", nbEtapesMin);

    return 0;
}

Compilation message

cultivation.cpp: In function 'int main()':
cultivation.cpp:85:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &nbLignes, &nbColonnes);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cultivation.cpp:99:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &nbCellulesPleines);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
cultivation.cpp:103:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &iLigne, &iColonne);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 73 ms 376 KB Output is correct
2 Correct 67 ms 376 KB Output is correct
3 Correct 63 ms 432 KB Output is correct
4 Correct 63 ms 560 KB Output is correct
5 Correct 66 ms 680 KB Output is correct
6 Correct 66 ms 680 KB Output is correct
7 Correct 64 ms 680 KB Output is correct
8 Correct 68 ms 680 KB Output is correct
9 Correct 65 ms 720 KB Output is correct
10 Correct 63 ms 720 KB Output is correct
11 Correct 71 ms 720 KB Output is correct
12 Correct 66 ms 720 KB Output is correct
13 Correct 69 ms 720 KB Output is correct
14 Correct 68 ms 720 KB Output is correct
15 Correct 68 ms 720 KB Output is correct
16 Correct 66 ms 720 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 73 ms 376 KB Output is correct
2 Correct 67 ms 376 KB Output is correct
3 Correct 63 ms 432 KB Output is correct
4 Correct 63 ms 560 KB Output is correct
5 Correct 66 ms 680 KB Output is correct
6 Correct 66 ms 680 KB Output is correct
7 Correct 64 ms 680 KB Output is correct
8 Correct 68 ms 680 KB Output is correct
9 Correct 65 ms 720 KB Output is correct
10 Correct 63 ms 720 KB Output is correct
11 Correct 71 ms 720 KB Output is correct
12 Correct 66 ms 720 KB Output is correct
13 Correct 69 ms 720 KB Output is correct
14 Correct 68 ms 720 KB Output is correct
15 Correct 68 ms 720 KB Output is correct
16 Correct 66 ms 720 KB Output is correct
17 Correct 66 ms 720 KB Output is correct
18 Correct 73 ms 720 KB Output is correct
19 Correct 76 ms 720 KB Output is correct
20 Correct 70 ms 720 KB Output is correct
21 Incorrect 77 ms 720 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 73 ms 376 KB Output is correct
2 Correct 67 ms 376 KB Output is correct
3 Correct 63 ms 432 KB Output is correct
4 Correct 63 ms 560 KB Output is correct
5 Correct 66 ms 680 KB Output is correct
6 Correct 66 ms 680 KB Output is correct
7 Correct 64 ms 680 KB Output is correct
8 Correct 68 ms 680 KB Output is correct
9 Correct 65 ms 720 KB Output is correct
10 Correct 63 ms 720 KB Output is correct
11 Correct 71 ms 720 KB Output is correct
12 Correct 66 ms 720 KB Output is correct
13 Correct 69 ms 720 KB Output is correct
14 Correct 68 ms 720 KB Output is correct
15 Correct 68 ms 720 KB Output is correct
16 Correct 66 ms 720 KB Output is correct
17 Correct 66 ms 720 KB Output is correct
18 Correct 73 ms 720 KB Output is correct
19 Correct 76 ms 720 KB Output is correct
20 Correct 70 ms 720 KB Output is correct
21 Incorrect 77 ms 720 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 720 KB Execution failed because the return code was nonzero
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 720 KB Execution failed because the return code was nonzero
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 73 ms 376 KB Output is correct
2 Correct 67 ms 376 KB Output is correct
3 Correct 63 ms 432 KB Output is correct
4 Correct 63 ms 560 KB Output is correct
5 Correct 66 ms 680 KB Output is correct
6 Correct 66 ms 680 KB Output is correct
7 Correct 64 ms 680 KB Output is correct
8 Correct 68 ms 680 KB Output is correct
9 Correct 65 ms 720 KB Output is correct
10 Correct 63 ms 720 KB Output is correct
11 Correct 71 ms 720 KB Output is correct
12 Correct 66 ms 720 KB Output is correct
13 Correct 69 ms 720 KB Output is correct
14 Correct 68 ms 720 KB Output is correct
15 Correct 68 ms 720 KB Output is correct
16 Correct 66 ms 720 KB Output is correct
17 Correct 66 ms 720 KB Output is correct
18 Correct 73 ms 720 KB Output is correct
19 Correct 76 ms 720 KB Output is correct
20 Correct 70 ms 720 KB Output is correct
21 Incorrect 77 ms 720 KB Output isn't correct
22 Halted 0 ms 0 KB -