Given a non-empty binary search tree and a target value, find the value in the BST that is closest to the target. Note: Given target value is a floating point. You are guaranteed to have only one unique value in the BST that is closest to the target.…
[抄题]: Given a non-empty binary search tree and a target value, find the value in the BST that is closest to the target. [暴力解法]: 时间分析: 空间分析: [奇葩输出条件]: [奇葩corner case]: [思维问题]: 以为要用主函数+ DFS来做.错了,“最近”还是直接用二分法左右查找得了 [一句话思路]: 定义一个res,如果root离target的距离小 就替换…
Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. Note: You may assume k is always valid, 1 ≤ k ≤ BST's total elements. Follow up: What if the BST is modified (insert/delete operations) often and you nee…
Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. Note: You may assume k is always valid, 1 ≤ k ≤ BST's total elements. Example 1: Input: root = [3,1,4,null,2], k = 1 3 / \ 1 4 \ 2 Output: 1 Example 2:…