"content":"<p>Table: <code>Tree</code></p>\n\n<pre>\n+-------------+------+\n| Column Name | Type |\n+-------------+------+\n| id | int |\n| p_id | int |\n+-------------+------+\nid is the column with unique values for this table.\nEach row of this table contains information about the id of a node and the id of its parent node in a tree.\nThe given structure is always a valid tree.\n</pre>\n\n<p> </p>\n\n<p>Each node in the tree can be one of three types:</p>\n\n<ul>\n\t<li><strong>"Leaf"</strong>: if the node is a leaf node.</li>\n\t<li><strong>"Root"</strong>: if the node is the root of the tree.</li>\n\t<li><strong>"Inner"</strong>: If the node is neither a leaf node nor a root node.</li>\n</ul>\n\n<p>Write a solution to report the type of each node in the tree.</p>\n\n<p>Return the result table in <strong>any order</strong>.</p>\n\n<p>The result format is in the following example.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/10/22/tree1.jpg\" style=\"width: 304px; height: 224px;\" />\n<pre>\n<strong>Input:</strong> \nTree table:\n+----+------+\n| id | p_id |\n+----+------+\n| 1 | null |\n| 2 | 1 |\n| 3 | 1 |\n| 4 | 2 |\n| 5 | 2 |\n+----+------+\n<strong>Output:</strong> \n+----+-------+\n| id | type |\n+----+-------+\n| 1 | Root |\n| 2 | Inner |\n| 3 | Leaf |\n| 4 | Leaf |\n| 5 | Leaf |\n+----+-------+\n<strong>Explanation:</strong> \nNode 1 is the root node because its parent node is null and it has child nodes 2 and 3.\nNode 2 is an inner node because it has parent node 1 and child node 4 and 5.\nNodes 3, 4, and 5 are leaf nodes because they have parent nodes and they do not have child nodes.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/10/22/tree2.jpg\" style=\"width: 64px; height: 65px;\" />\n<pre>\n<strong>Input:</strong> \nTree table:\n+----+------+\n| id | p_id |\n+----+------+\n| 1 | null |\n+----+------+\n<strong>Output:</strong> \n+----+-------+\n| id | type |\n+----+-------+\n| 1 | Root |\n+----+-------+\n<strong>Explanation:</strong> If there is only one node on the tree, you only need to output its root attributes.\n</pre>\n",
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