111. Minimum Depth of Binary Tree#22
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tom4649
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Jun 2, 2026
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| int left = minDepth(root.left); | ||
| int right = minDepth(root.right); | ||
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| if (root.left != null && root.right == null) { | ||
| return left + 1; | ||
| } | ||
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| if (root.left == null && root.right != null) { | ||
| return right + 1; | ||
| } |
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条件分岐は以下の方がわかりやすいと思いました。
if (root.left == null) {
return minDepth(root.right) + 1;
}
if (root.right == null) {
return minDepth(root.left) + 1;
}
return Math.min(minDepth(root.left), minDepth(root.right)) + 1;
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111. Minimum Depth of Binary Treeを解きました