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class Solution
{
    public static int NumOffices(char[][] grid) 
    {
        int result = 0;
        
        
        return result;
    }
}

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var matrix = GetMatrix();
            var numOffices = Solution.NumOffices(matrix);
            Console.WriteLine(numOffices);
        }
        
        public static char[][] GetMatrix()
        {
            var rows = int.Parse(Console.ReadLine());
            var cols = int.Parse(Console.ReadLine());

            char[][] matrix = new char[rows][];
            for (var i = 0; i < rows; i++)
            {
                var line = Console.ReadLine();
                matrix[i] = line.ToCharArray();
            }
            return matrix;
        }
    }
}

class Solution
{
    public static int NumOffices(char[][] grid) 
    {
        int result = 0;
        
        
        return result;
    }
}

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var matrix = GetMatrix();
            var numOffices = Solution.NumOffices(matrix);
            Console.WriteLine(numOffices);
        }
        
        public static char[][] GetMatrix()
        {
            var rows = int.Parse(Console.ReadLine());
            var cols = int.Parse(Console.ReadLine());

            char[][] matrix = new char[rows][];
            for (var i = 0; i < rows; i++)
            {
                var line = Console.ReadLine();
                matrix[i] = line.ToCharArray();
            }
            return matrix;
        }
    }
}