private static int GetTreeCount(SlopeMap map, int stepX, int stepY)
{
var treeCount = 0;
var x = 0;
var y = 0;
while (y < map.MapHeight)
{
if (map.GetGeologyForCoordinate(x, y) == MapGeology.Tree)
{
treeCount++;
}
x += stepX;
if (x > map.MapWidth - 1)
{
x -= map.MapWidth;
}
y += stepY;
}
return(treeCount);
}
public static int Third2(List <string> input)
{
var map = new SlopeMap(input);
var instructions = new List <Tuple <int, int> >
{
new Tuple <int, int>(1, 1),
new Tuple <int, int>(3, 1),
new Tuple <int, int>(5, 1),
new Tuple <int, int>(7, 1),
new Tuple <int, int>(1, 2),
};
var result = 1;
foreach (var instruction in instructions)
{
result = result * GetTreeCount(map, instruction.Item1, instruction.Item2);
}
return(result);
}
public static int Third1(List <string> input)
{
var map = new SlopeMap(input);
return(GetTreeCount(map, 3, 1));
}