36 lines
802 B
Ruby
36 lines
802 B
Ruby
# Definition for a binary tree node.
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# class TreeNode
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# attr_accessor :val, :left, :right
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# def initialize(val = 0, left = nil, right = nil)
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# @val = val
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# @left = left
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# @right = right
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# end
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# end
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# @param {TreeNode} root
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# @param {Integer} val
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# @return {TreeNode}
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def insert_into_bst(root, val)
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new_node = TreeNode.new(val)
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if root == nil then
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return new_node
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end
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node = root
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while (val < node.val && node.left != nil) || (val >= node.val && node.right != nil) do
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if val < node.val then
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node = node.left
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else
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node = node.right
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end
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end
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# insert the node
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if val < node.val then
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node.left = new_node
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else
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node.right = new_node
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end
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return root
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end
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