int CharToInt(char c)
{
switch (c)
{
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
return(c - '0');
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
return(10 + (c - 'a'));
}
Oh.ShttingHell();
return(-1);
}
char[] NextPos(string action, char[] current)
{
switch (action[0])
{
case 's':
return(Shift(int.Parse(action.Substring(1)), current));
case 'x':
return(Exchange(action.Substring(1), current));
case 'p':
return(ExchangeByName(action.Substring(1), current));
}
Oh.ShttingHell();
return(null);
}
public void Step(char currentLocation)
{
switch (currentLocation)
{
case '/':
if (dX == 0)
{
TurnRight();
}
else
{
TurnLeft();
}
break;
case '\\':
if (dX == 0)
{
TurnLeft();
}
else
{
TurnRight();
}
break;
case '+':
UpdateCrossing();
break;
case '.':
break;
default:
Oh.ShttingHell();
break;
}
x += dX;
y += dY;
}
Graph <int> BuildGraph(string key)
{
var graph = new Graph <int>();
for (var y = 0; y < GridSize; y++)
{
var rowKey = $"{key}-{y}";
var hash = Hash(rowKey);
if (hash.Length != 32)
{
Oh.ShttingHell();
}
var x = 0;
foreach (var ic in hash)
{
var c = CharToInt(ic);
for (var bit = 0; bit < 4; bit++)
{
if ((c & 8) == 8)
{
var id = GetNodeId(x, y);
graph.AddNode(id);
var children = GetChildren(x, y, graph);
foreach (var linkId in children)
{
graph.AddTwoWayLink(id, linkId);
}
}
c <<= 1;
x++;
}
}
}
return(graph);
}