public static void Run()
{
string s = @"
75
95 64
17 47 82
18 35 87 10
20 04 82 47 65
19 01 23 75 03 34
88 02 77 73 07 63 67
99 65 04 28 06 16 70 92
41 41 26 56 83 40 80 70 33
41 48 72 33 47 32 37 16 94 29
53 71 44 65 25 43 91 52 97 51 14
70 11 33 28 77 73 17 78 39 68 17 57
91 71 52 38 17 14 91 43 58 50 27 29 48
63 66 04 68 89 53 67 30 73 16 69 87 40 31
04 62 98 27 23 09 70 98 73 93 38 53 60 04 23
";
TriangleTree tree = TriangleTree.Parse(s);
Debug.WriteLine(tree.ToString());
int answer = tree.CalculateMaximumPathSum();
Debug.WriteLine("The answer is " + answer);
}
public static void Run()
{
string filename = @"Files\067.txt";
string s = File.ReadAllText(filename);
TriangleTree tree = TriangleTree.Parse(s);
Debug.WriteLine(tree.ToString());
int answer = tree.CalculateMaximumPathSum();
Debug.WriteLine("The answer is " + answer);
}
// Takes a string that looks like:
//
// 3
// 7 4
// 2 4 6
// 8 5 9 3
//
// and parses it into a TriangleTree object.
//
public static TriangleTree Parse(string s)
{
TriangleTree tree = new TriangleTree();
StringReader reader = new StringReader(s.Trim());
// Start by putting them in a list of arrays
List <TriangleTreeNode[]> treelist = new List <TriangleTreeNode[]>();
while (reader.Peek() != -1)
{
string line = reader.ReadLine().Trim();
string[] itemsInLine = line.Split(new char[] { ' ' }).Where(i => !string.IsNullOrEmpty(i)).ToArray();
int[] ints = itemsInLine.Select(i => int.Parse(i)).ToArray();
treelist.Add(ints.Select(i => new TriangleTreeNode {
Value = i
}).ToArray());
}
// Set the relationships
for (int i = 1; i < treelist.Count; i++)
{
var parentArray = treelist[i - 1];
for (int j = 0; j < treelist[i].Length; j++)
{
var node = treelist[i][j];
var leftParent = j == 0 ? null : parentArray[j - 1];
var rightParent = j == treelist[i].Length - 1 ? null : parentArray[j];
if (leftParent != null)
{
node.LeftParent = leftParent;
leftParent.RightChild = node;
}
if (rightParent != null)
{
node.RightParent = rightParent;
rightParent.LeftChild = node;
}
}
}
// Assign the root
tree.Root = treelist[0][0];
return(tree);
}
public TriangleTree Clone()
{
TriangleTree clone = TriangleTree.Parse(this.ToString());
return(clone);
}
