Design a Rate Limiter in Python
Implement a rate limiter with the following methods: RateLimiter(int expire) constructs a new rate limiter with the given expire time. limit(int uid, int timestamp) returns whether the user should …
Teaching Kids Programming – Introduction to Permutation and Combination
February 20, 2021
algorithms, Combination, Combinatoric Mathematics, math, Permutation, programming languages, python, recursive, teaching kids programming, youtube video
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Teaching Kids Programming: Videos on Data Structures and Algorithms Permutation and Combination are the math concepts to count. Given N items, if we want to choose M items (M …
Improved Depth First Search Algorithm to Generate Combinations of Parentheses
Implement an algorithm to print all valid (e.g., properly opened and closed) combinations of n pairs of parentheses. Note: The result set should not contain duplicated subsets. For example, …
Teaching Kids Programming – The Left Side View of Binary Tree via Breadth First Search Algorithm
Teaching Kids Programming: Videos on Data Structures and Algorithms Given a binary tree root, return the leftmost node’s value on each level of the tree. Constraints n ≤ 100,000 …
Generate the Power SubSet using Depth First Search Algorithm
Write a method to return all subsets of a set. The elements in a set are pairwise distinct. Note: The result set should not contain duplicated subsets. Example: Input: nums …
Teaching Kids Programming – Recursive Depth First Search Algorithm to Compare Leaf Equivalent Trees
Teaching Kids Programming: Videos on Data Structures and Algorithms Given two binary trees root0 and root1, return whether the sequence of leaves left-to-right in both trees are the same. …