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#include
using namespace std;
int sum(int freq[], int low, int high) { //sum of frequency from low to high range
int sum = 0;
for (int k = low; k
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#include
using namespace std;
int sum(int freq[], int low, int high) { //sum of frequency from low to high range
int sum = 0;
for (int k = low; k
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## 🚀 Feature
To check whether a given tree is a valid Binary Search Tree (BST) or not.
### Have you read the Contribution Guidelines?
YES
## Pitch
An important topic for competitive cod…
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Given a binary tree root, return whether it's a binary search tree. A binary tree node is a binary search tree if :
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1. All nodes on its left subtree are smaller than node.val
2. All nod…
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Given a binary tree, determine if it is a valid binary search tree (BST).
Assume a BST is defined as follows:
The left subtree of a node contains only nodes with keys less than the node's key.
…
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**Write code in the preferred language and attach output with it.**
Given an integer n, return all the structurally unique BST's (binary search trees), which has exactly n nodes of unique values fr…
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@AdiChat Pls review #244 . I have implemented it in python
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- Can be in any language, multiple submissions from single language are not welcome.
- Solutions should be submitted to this [directory](https://github.com/zairza-cetb/hacktoberfest-2018/tr…
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search, insert
min, max
floor, ceiling, rank
delete
range search
处理BST的问题时大多使用dfs, recursion, divide and conquer, 左右子树分别处理