Takefumi Yamamura's blog

This blog is for my memorandum about programming and English.

Happy Coding

This blog is for my memorandum

Entries from 2017-02-02 to 1 day

Validate BST

problem Implement a function to check if a binary tree is a binary search tree. how to solve Binary search tree means that all left nodes must be less than or equal to the current node and all right nodes must be more than or equal to the …