Hi, I wrote the solution but I don't know what it is wrong. Could you plz check the code for me? Cause I don't know if I get the point correctly.

#include <iostream>
#include <queue>

using namespace std;

char arr[10][10];

class Coord
{
public:
    Coord()
    {
    }

    Coord(int nx, int ny)
    {
        x = nx;
        y = ny;
    }
    int x, y;
};

void ReadFirst(int n, int x, int y)
{
    arr[x - 1][y - 1] = '1';

    for(int i = 1; i < n; i++)
    {
        cin >> x >> y;
        arr[x - 1][y - 1] = '1';
    }
}

Coord neighbor(int x, int y, char ch)
{
    switch(ch)
    {
    case 'R':return Coord(x + 1, y);
    case 'T':return Coord(x, y + 1);
    case 'L':return Coord(x - 1, y);
    case 'B':return Coord(x, y - 1);
    default: return Coord(x, y);
    }
}

void ReadSecond(int x, int y, char ch)
{
    queue<Coord> theQueue;
    Coord tCor;
    arr[x][y] = '1';

    while(ch != '.')
    {
        tCor = neighbor(x, y, ch);
        arr[tCor.x][tCor.y] = '1';
        theQueue.push(tCor);

        while(true)
        {
            ch = cin.get();

            while(iswspace(ch))
                ch = cin.get();

            if(ch == ',')
            {
                tCor = theQueue.front();
                x = tCor.x;
                y = tCor.y;
                theQueue.pop();
            }
            else
                break;
        }
    }
}

void PrintFirst()
{
    int i, j, count = 0;
    for(i = 0; i < 10; i++)
    {
        for(j = 0; j < 10; j++)
        {
            if(arr[i][j] == '1')
                count++;
        }
    }

    cout << count << endl;

    for(i = 0; i < 10; i++)
    {
        for(j = 0; j < 10; j++)
        {
            if(arr[i][j] == '1')
            {
                cout << i + 1 << ' ' << j + 1 << endl;
            }
        }
    }
}

void PrintSecond()
{
    int x, y;
    bool flag = false;
    for(x = 0; x < 10 && !flag; x++)
    {
        for(y = 0; y < 10; y++)
        {
            if(arr[x][y] == '1')
            {
                flag = true;
                break;
            }
        }
    }

    //first line coordinate
    x--;
    cout << x + 1 << ' ' << y + 1 << endl;

    queue<Coord> theQueue;
    Coord curCor, tCor;
    theQueue.push(Coord(x, y));

    while(!theQueue.empty())
    {
        curCor = theQueue.front();
        theQueue.pop();

        x = curCor.x;
        y = curCor.y;

        arr[x][y] = '0';

        if(arr[x + 1][y] == '1')
        {
            theQueue.push(Coord(x + 1, y));
            cout.put('R');
            arr[x + 1][y] = '0';
        }

        if(arr[x][y + 1] == '1')
        {
            theQueue.push(Coord(x + 1, y));
            cout.put('T');
            arr[x][y + 1] = '0';
        }

        if(arr[x - 1][y] == '1')
        {
            theQueue.push(Coord(x + 1, y));
            cout.put('L');
            arr[x - 1][y] = '0';
        }

        if(arr[x][y - 1] == '1')
        {
            theQueue.push(Coord(x + 1, y));
            cout.put('B');
            arr[x][y - 1] = '0';
        }

        if(theQueue.empty())
            cout << '.' << endl;
        else
            cout << ',' << endl;
    }
}

void main()
{
    char ch, buffer[3];
    int n, m;

    for(int i = 0; i < 10; i++)
    {
        for(int j = 0; j < 10; j++)
            arr[i][j] = '0';
    }

    cin >> n;

    cin >> m;

    cin.get();
    ch = cin.get();

    if(ch >= '0' && ch <= '9')
    {
        buffer[0] = ch;
        ch = cin.get();
        if(ch == ' ')
        {
            buffer[1] = '\0';
        }
        else
        {
            buffer[1] = ch;
            buffer[2] = '\0';
        }

        int y = atoi(buffer);

        ReadFirst(n, m, y);
        PrintSecond();
    }
    else
    {
        ReadSecond(n - 1, m - 1, ch);
        PrintFirst();
    }
}