Cod sursa(job #2664978)

Utilizator paulconst1Constantinescu Paul paulconst1 Data 29 octombrie 2020 20:39:02
Problema Rj Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 2.8 kb
#include <fstream>
#include <queue>
#include <cstring>

using namespace std;

const int NMAX = 100;
const int MMAX = 100;
bool oras[1 + NMAX][1 + MMAX];
char linie[2 + MMAX];

int romeo[1 + NMAX][1 + MMAX];
int julieta[1 + NMAX][1 + MMAX];

queue <pair<int, int>> q;

int dx[] = {-1, 0, 0, 1, 1, -1, 1,-1};
int dy[] = { 0,-1, 1, 0, 1, -1,-1, 1};

int xR, yR, xJ, yJ;

void bfs1()
{
    romeo[xR][yR] = 1;
    q.push(make_pair(xR, yR));

    while(!q.empty())
    {
        int x = q.front().first;
        int y = q.front().second;
        q.pop();

        for (int i = 0 ; i < 8; i++)
        {
            int xVecin = x + dx[i];
            int yVecin = y + dy[i];

            if (!oras[xVecin][yVecin] && romeo[xVecin][yVecin] == 0)
            {
                romeo[xVecin][yVecin] = romeo[x][y] + 1;
                q.push(make_pair(xVecin, yVecin));
            }
        }
    }
}

void bfs2()
{
    julieta[xJ][yJ] = 1;
    q.push(make_pair(xJ, yJ));

    while(!q.empty())
    {
        int x = q.front().first;
        int y = q.front().second;
        q.pop();

        for (int i = 0 ; i < 8; i++)
        {
            int xVecin = x + dx[i];
            int yVecin = y + dy[i];

            if (!oras[xVecin][yVecin] && julieta[xVecin][yVecin] == 0)
            {
                julieta[xVecin][yVecin] = julieta[x][y] + 1;
                q.push(make_pair(xVecin, yVecin));
            }
        }
    }
}

int main()
{
    ifstream in("rj.in");
    ofstream out("rj.out");
    int n, m;

    in >> n >> m;
    in.get();

    for (int i = 0; i <= n + 1; i++)
    {
        oras[i][0] = true;
        oras[i][m + 1] = true;
    }
    for (int i = 0; i <= m + 1; i++)
    {
        oras[0][i] = true;
        oras[n + 1][i] = true;
    }


    for (int i = 1; i <= n; i++)
    {
        in.getline(linie, 1 + m);
        int lung = strlen(linie);
        for (int j = 1; j <= lung; j++)
        {
            switch(linie[j - 1])
            {
            case 'X':
                oras[i][j] = true;
                break;
            case 'R':
                xR = i;
                yR = j;
                break;
            case 'J':
                xJ = i;
                yJ = j;
            }
        }
    }

    bfs1();
    bfs2();

    int minim = n * m;
    int iminim = -1;
    int jminim = -1;

    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= m; j++)
        {
            if (!oras[i][j] && romeo[i][j] == julieta[i][j] && romeo[i][j] != 0 && minim > romeo[i][j])
            {
                minim = romeo[i][j];
                iminim = i;
                jminim = j;
            }
        }
    }

    out << minim << ' ' << iminim << ' ' << jminim << '\n';

    return 0;
}