Submission #240651

#	Time	Username	Problem	Language	Result	Execution time	Memory
240651		robertnovistan	Hamburg Steak (JOI20_hamburg)	C++14	2 / 100	289 ms	6520 KiB

hamburg

#include <iostream>
#include <cstdio>
#include <algorithm>
using namespace std;

const int MAX_STEAKS = (200 * 1000);

int Steaks[MAX_STEAKS][4];

int PossiblesPiques[4][2];

int Choisi[4];

pair <int, int> Horizontaux[MAX_STEAKS + 1];
pair <int, int> Verticaux[MAX_STEAKS + 1];

int nbSteaks, nbPiques;

void Read() {
    scanf("%d%d", &nbSteaks, &nbPiques);
    for (int i = 0; i < nbSteaks; i ++)
    {
        for (int j = 0; j < 4; j ++)
        {
            scanf("%d", &Steaks[i][j]);
        }
        Horizontaux[i] = make_pair(Steaks[i][0], ++ Steaks[i][2]);
        Verticaux[i] = make_pair(Steaks[i][1], ++ Steaks[i][3]);
    }
    sort(Horizontaux, Horizontaux + nbSteaks);
    sort(Verticaux, Verticaux + nbSteaks);
    return;
}

void TraiteHorizontaux() {
    int nbPik = 0;
    int act = 0;
    int minfin = Horizontaux[0].second;
    while (act < nbSteaks)
    {
        if (Horizontaux[act].first >= minfin)
        {
            PossiblesPiques[nbPik ++][0] = minfin - 1;
            minfin = Horizontaux[act + 1].second;
        }
        minfin = min(minfin, Horizontaux[act].second);
        act ++;
    }
    PossiblesPiques[nbPik ++][0] = minfin - 1;
    for (int i = nbPik; i < nbPiques; i ++)
    {
        PossiblesPiques[i][0] = PossiblesPiques[i - 1][0];
    }
    return;
}

void TraiteVerticaux() {
    int nbPik = 0;
    int act = 0;
    int minfin = Verticaux[0].second;
    while (act < nbSteaks)
    {
        if (Verticaux[act].first >= minfin)
        {
            PossiblesPiques[nbPik ++][1] = minfin - 1;
            minfin = Verticaux[act + 1].second;
        }
        minfin = min(minfin, Verticaux[act].second);
        act ++;
    }
    PossiblesPiques[nbPik ++][1] = minfin - 1;
    for (int i = nbPik; i < nbPiques; i ++)
    {
        PossiblesPiques[i][1] = PossiblesPiques[i - 1][1];
    }
    return;
}

bool Inter(int i, int lig, int col) {
    return Steaks[i][0] <= lig && lig < Steaks[i][2] && Steaks[i][1] <= col && col < Steaks[i][3];
}

bool Verify() {
    for (int i = 0; i < nbSteaks; i ++)
    {
        bool t = false;
        for (int j = 0; j < nbPiques; j ++)
        {
            if (Inter(i, PossiblesPiques[j][0], Choisi[j]))
            {
                t = true;
            }
        }
        if (!t)
        {
            return false;
        }
    }
    return true;
}

bool Choose(int cur) {
    if (cur == nbPiques)
    {
        return Verify();
    }
    for (int i = 0; i < nbPiques; i ++)
    {
        Choisi[cur] = PossiblesPiques[i][1];
        if (Choose(cur + 1))
        {
            return true;
        }
    }
    return false;
}

void Solve() {
    if (Choose(0))
    {
        //printf("42\n");
    }
    for (int i = 0; i < nbPiques; i ++)
    {
        printf("%d %d\n", PossiblesPiques[i][0], Choisi[i]);
    }
    return;
}

void Print() {
    for (int i = 0; i < nbSteaks; i ++)
    {
        //printf("%d %d\n", Horizontaux[i].first, Horizontaux[i].second);
    }
    for (int i = 0; i < nbSteaks; i ++)
    {
        //printf("%d %d\n", Verticaux[i].first, Verticaux[i].second);
    }
    for (int i = 0; i < nbPiques; i ++)
    {
        //printf("%d %d\n", PossiblesPiques[i][0], PossiblesPiques[i][1]);
    }
    return;
}

int main() {
    Read();
    TraiteHorizontaux();
    TraiteVerticaux();
    Solve();
    Print();
    return 0;
}

Compilation message (stderr)

hamburg.cpp: In function 'void Read()':
hamburg.cpp:20:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   20 |     scanf("%d%d", &nbSteaks, &nbPiques);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
hamburg.cpp:25:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   25 |             scanf("%d", &Steaks[i][j]);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 1 / 1
• Subtask 2: 0 / 1
• Subtask 3: 0 / 3
• Subtask 4: 0 / 6
• Subtask 5: 1 / 1
• Subtask 6: 0 / 3
• Subtask 7: 0 / 6
• Subtask 8: 0 / 79