Lymph nodes are small bean shaped glands found throughout the body, including the head and neck. They are part of the lymphatic system that filters body fluid and fights infection. They also trap ...

delete the node with value equal to `key` and return the new root. The BST must remain valid after deletion. 1. **No child**: Simply remove it. 2. **One child**: Replace it with its single child. 3. * ...

// Consider how you would deal with a father node with its left sub tree and right sub tree: // 1. First, we hope left sub tree to be a tree that has been 'done well'. // 2. Then, we would add ...