public static Solution solve(PictureDescription pd)
{
Solution solution = new Solution(pd);
//PictureDescription auxPd = new PictureDescription(pd.NumRows, pd.NumCols);
for (int row = 0; row < pd.NumRows; row++)
{
DrawState currentState = DrawState.EMPTY;
int[] from = new int[2];
int length = 0;
for (int column = 0; column < pd.NumCols; column++)
{
switch (currentState)
{
case DrawState.EMPTY:
if (pd.IsFilled(column, row))
{
from[0] = column;
from[1] = row;
length = 1;
currentState = DrawState.FILL;
if (column == pd.NumCols - 1)
{
solution.AddCommand(solution.MakeHorizontalLine(from[0], from[1], length));
currentState = DrawState.EMPTY;
}
}
break;
case DrawState.FILL:
if (!pd.IsFilled(column, row))
{
solution.AddCommand(solution.MakeHorizontalLine(from[0], from[1], length));
currentState = DrawState.EMPTY;
}else if (column == pd.NumCols - 1)
{
solution.AddCommand(solution.MakeHorizontalLine(from[0], from[1], ++length));
currentState = DrawState.EMPTY;
}
else
{
length++;
}
break;
}
}
}
return solution;
}
private static void TryHorizontalLines(PictureDescription descriptor, Solution solution, ref Command? bestCommand, ref int bestScore)
{
for (int y = 0; y < descriptor.NumRows; ++y)
{
for (int x = 0; x < descriptor.NumCols;)
{
int startX = x;
int endX = x;
bool skipped = false;
int score = 0;
for (;;)
{
if (x >= descriptor.NumCols)
{
break;
}
if (descriptor.IsFilled(x, y))
{
if (!solution.IsFilled(x, y))
{
++score;
endX = x;
}
} else if (skipped)
{
skipped = true;
} else
{
++x;
break;
}
++x;
}
int len = endX - startX + 1;
if (len > 0)
{
if (score > 0 && score > bestScore)
{
var command = solution.MakeHorizontalLine(startX, y, len);
if (score > bestScore)
{
bestCommand = command;
bestScore = score;
}
}
}
}
}
}