Essay
Assuming a Node class
class Node
{
int element;
Node left,right;
Node(int el,Node left,Node right){
element = el;
this.left = left;
this.right = right;
}
}
Write a method int numberLeaves(Node tree)that returns the number of leaves in the binary tree whose root is tree.
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int numberLeaves(Node tree)
{
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{
...
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