public void BSTFromPreorderTraversalM()
{
int[] preOrderTraversal = { 10, 5, 1, 7, 40, 50 };
BSTFromPreorderTraversalC bstFromPreorderTraversal = new BSTFromPreorderTraversalC();
NodeInt root = bstFromPreorderTraversal.ConstructBSTFromPreorderTraversal(preOrderTraversal, preOrderTraversal.Length);
TreeTraversals treeTraversals = new TreeTraversals();
treeTraversals.PreOrderTreeTraversal(root);
}
public int FindMaxPathFromRoot(NodeInt node)
{
if (node == null)
{
return(0);
}
int leftNodeSum = FindMaxPathFromRoot(node.left);
int rightNodeSum = FindMaxPathFromRoot(node.right);
return(node.Value + Math.Max(leftNodeSum, rightNodeSum));
}
public void PostOrderTreeTraversal(NodeInt node)
{
if (node == null)
{
return;
}
PostOrderTreeTraversal(node.left);
PostOrderTreeTraversal(node.right);
Console.Write(node.Value + " ");
}
public NodeInt ConstructBSTFromPreorderTraversal(int[] preorderTraversal, int size)
{
// The first element of pre[] is always root
NodeInt root = new NodeInt(preorderTraversal[0]);
Stack <NodeInt> s = new Stack <NodeInt>();
// Push root
s.Push(root);
// Iterate through rest of the size-1 items of given preorder array
for (int i = 1; i < size; ++i)
{
NodeInt temp = null;
/* Keep on popping while the next value is greater than
* stack's top value. */
while (s.Count > 0 && preorderTraversal[i] > s.Peek().Value)
{
temp = s.Pop();
}
// Make this greater value as the right child
// and push it to the stack
if (temp != null)
{
temp.right = new NodeInt(preorderTraversal[i]);
s.Push(temp.right);
}
// If the next value is less than the stack's top
// value, make this value as the left child of the
// stack's top node. Push the new node to stack
else
{
temp = s.Peek();
temp.left = new NodeInt(preorderTraversal[i]);
s.Push(temp.left);
}
}
return(root);
}
public void RootToLeafSumM()
{
NodeInt root = new NodeInt(10)
{
left = new NodeInt(20),
right = new NodeInt(30)
};
root.left.left = new NodeInt(100)
{
left = new NodeInt(50),
right = new NodeInt(100)
};
root.left.right = new NodeInt(200)
{
left = new NodeInt(40),
right = new NodeInt(20)
};
RootToLeafSum rootToLeafSum = new RootToLeafSum();
Console.WriteLine(rootToLeafSum.FindRootToLeafSum(root, 270));
}
public void MaxSumPathFromRootM()
{
NodeInt root = new NodeInt(10)
{
left = new NodeInt(20),
right = new NodeInt(30)
};
root.left.left = new NodeInt(10)
{
left = new NodeInt(50),
right = new NodeInt(100)
};
root.left.right = new NodeInt(200)
{
left = new NodeInt(40),
right = new NodeInt(20)
};
MaxPathFromRoot maxPathFromRoot = new MaxPathFromRoot();
maxPathFromRoot.FindMaxPathFromRoot(root);
}
public bool FindRootToLeafSum(NodeInt node, int sum)
{
// if (node == null)
// {
// return (sum == 0);
// }
int mySum = sum - node.Value;
bool result = false;
if (mySum == 0 && node.left == null && node.right == null)
{
return(true);
}
if (mySum > 0 && node.left != null)
{
result = result || FindRootToLeafSum(node.left, mySum);
}
if (mySum > 0 && node.right != null)
{
result = result || FindRootToLeafSum(node.right, mySum);
}
return(result);
}
