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31 lines
1.2 KiB
HTML
31 lines
1.2 KiB
HTML
<p>Given the <code>root</code> of a binary tree, each node in the tree has a distinct value.</p>
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<p>After deleting all nodes with a value in <code>to_delete</code>, we are left with a forest (a disjoint union of trees).</p>
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<p>Return the roots of the trees in the remaining forest. You may return the result in any order.</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/2019/07/01/screen-shot-2019-07-01-at-53836-pm.png" style="width: 237px; height: 150px;" />
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<pre>
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<strong>Input:</strong> root = [1,2,3,4,5,6,7], to_delete = [3,5]
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<strong>Output:</strong> [[1,2,null,4],[6],[7]]
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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 = [1,2,4,null,3], to_delete = [3]
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<strong>Output:</strong> [[1,2,4]]
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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 given tree is at most <code>1000</code>.</li>
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<li>Each node has a distinct value between <code>1</code> and <code>1000</code>.</li>
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<li><code>to_delete.length <= 1000</code></li>
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<li><code>to_delete</code> contains distinct values between <code>1</code> and <code>1000</code>.</li>
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</ul>
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