Binary Tree
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Construct Binary Tree from Preorder and inorder traversal
Index mapping with hash map where map[inorder[i]] = i and delete while loop and replace with int pivot = map[preorder[rootIndex]];
Construct Binary Tree from Preorder and inorder traversal
Index mapping with hash map where map[inorder[i]] = i and delete while loop and replace with int pivot = map[preorder[rootIndex]];
