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39 lines
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39 lines
1.8 KiB
HTML
<p>You are given the <code>root</code> node of a binary search tree (BST) and a <code>value</code> to insert into the tree. Return <em>the root node of the BST after the insertion</em>. It is <strong>guaranteed</strong> that the new value does not exist in the original BST.</p>
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<p><strong>Notice</strong> that there may exist multiple valid ways for the insertion, as long as the tree remains a BST after insertion. You can return <strong>any of them</strong>.</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<img alt="" src="https://assets.leetcode.com/uploads/2020/10/05/insertbst.jpg" style="width: 752px; height: 221px;" />
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<pre>
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<strong>Input:</strong> root = [4,2,7,1,3], val = 5
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<strong>Output:</strong> [4,2,7,1,3,5]
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<strong>Explanation:</strong> Another accepted tree is:
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<img alt="" src="https://assets.leetcode.com/uploads/2020/10/05/bst.jpg" style="width: 352px; height: 301px;" />
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</pre>
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<p><strong class="example">Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> root = [40,20,60,10,30,50,70], val = 25
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<strong>Output:</strong> [40,20,60,10,30,50,70,null,null,25]
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</pre>
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<p><strong class="example">Example 3:</strong></p>
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<pre>
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<strong>Input:</strong> root = [4,2,7,1,3,null,null,null,null,null,null], val = 5
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<strong>Output:</strong> [4,2,7,1,3,5]
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</pre>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li>The number of nodes in the tree will be in the range <code>[0, 10<sup>4</sup>]</code>.</li>
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<li><code>-10<sup>8</sup> <= Node.val <= 10<sup>8</sup></code></li>
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<li>All the values <code>Node.val</code> are <strong>unique</strong>.</li>
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<li><code>-10<sup>8</sup> <= val <= 10<sup>8</sup></code></li>
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<li>It's <strong>guaranteed</strong> that <code>val</code> does not exist in the original BST.</li>
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</ul>
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