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invert tree
Instructions:
Write a function that takes tree and inverts(flips) and returns it.
type Node struct {
Val int
Left *Node
Right *Node
}
Example:
Input:
7
/ \
5 10
/ \ / \
3 6 9 13
Output:
7
/ \
10 5
/ \ / \
13 9 6 3
Expected function:
func InvertTree(root *Node) *Node {
}
