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View Code? Open in Web Editor NEW数据结构和算法,刷题笔记,JavaScript,leetcode
数据结构和算法,刷题笔记,JavaScript,leetcode
将一个按照升序排列的有序数组,转换为一棵高度平衡二叉搜索树。
本题中,一个高度平衡二叉树是指一个二叉树每个节点 的左右两个子树的高度差的绝对值不超过 1。
示例:
给定有序数组: [-10,-3,0,5,9],
一个可能的答案是:[0,-3,9,-10,null,5],它可以表示下面这个高度平衡二叉搜索树:
0
/ \
-3 9
/ /
-10 5
来源:力扣(LeetCode)
链接:https://leetcode-cn.com/problems/convert-sorted-array-to-binary-search-tree
著作权归领扣网络所有。商业转载请联系官方授权,非商业转载请注明出处。
var sortedArrayToBST = function(nums) {
return buildNode(nums,0,nums.length - 1)
function buildNode(nums,start,end) {
if(start > end) return null
let mid = (start + end) >>> 1
let root = new TreeNode(nums[mid])
root.left = buildNode(nums,start,mid - 1)
root.right = buildNode(nums,mid + 1,end)
return root
}
};
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