private static void Main(string[] args)
{
int employeesCount = int.Parse(Console.ReadLine());
bool[,] graph = new bool[employeesCount, employeesCount];
bool[] visited = new bool[employeesCount];
for (int i = 0; i < employeesCount; i++)
{
string inputLine = Console.ReadLine();
for (int j = 0; j < employeesCount; j++)
{
if (inputLine[j] == 'N')
{
graph[i, j] = false;
}
else
{
graph[i, j] = true;
}
}
}
var graphClass = new Graph(graph);
graphClass.Traverse();
graphClass.ShowSort();
}
static void Main()
{
int employeesCount = int.Parse(Console.ReadLine());
List<Node>[] edges = new List<Node>[employeesCount];
int[,] matrix = new int[employeesCount, employeesCount];
char[,] c = new char[employeesCount, employeesCount];
int[] sums = new int[employeesCount];
for (int i = 0; i < c.GetLength(0); i++)
{
string line = Console.ReadLine();
edges[i] = new List<Node>();
for (int j = 0; j < c.GetLength(1); j++)
{
c[i, j] = line[j];
if (line[j] == 'Y')
{
edges[i].Add(new Node(j, 0));
}
}
if(edges[i].Count == 0)
{
sums[i] = 1;
}
}
for (int i = 0; i < matrix.GetLength(1); i++)
{
for (int j = 0; j < matrix.GetLength(0); j++)
{
if(c[j, i] == 'Y')
{
matrix[j, i] = 1;
}
}
}
var graph = new Graph(matrix);
graph.TestDfs();
var elements = graph.SortedElements;
for (int i = 0; i < elements.Count; i++)
{
var current = edges[elements[i]];
foreach (var item in current)
{
sums[elements[i]] += sums[item.Vertex];
}
}
Console.WriteLine(sums.Sum());
}