#include<iostream>
using namespace std;

int min(int a,int b,int c)
{
    int min = a;
    if(min > b)
        min = b;
    if(min > c)
        min = c;
    return min;
}

int main()
{
    const int size  = 5;
    char a[size][size] = { {'b','b','b','b','w'},{'b','b','b','b','b'},{'b','b','b','b','b'},{'b','b','w','b','b'},{'b','w','w','b','b'} };
    int arr[size+1][size+1];
    // First row and First column of arr is zero.
    for(int i=0;i<size+1;i++)
    {
        arr[0][i] = 0;
        arr[i][0] = 0;
    }
    int answer = 0;
    for(int i=0;i<size;i++)
    {
        for(int j=0;j<size;j++)
        {
            if(a[i][j] == 'w')
                arr[i+1][j+1] = 0;
            if(a[i][j] == 'b')
            {
                int minimum = min(arr[i][i],arr[i+1][j],arr[i][j+1]);
                arr[i+1][j+1] = minimum + 1;
                if( arr[i+1][j+1] > answer)
                    answer = arr[i+1][j+1];
            }
        }
    }
    for(int i=0;i<size+1;i++)
    {
        for(int j=0;j<size+1;j++)
        {
            cout<<arr[i][j]<<"\t";
        }
        cout<<endl;
    }
    cout<<answer<<endl;
    return 0;
}