Linked List Delete Last Occurrence of Value
Given a singly linked list node, and an integer target, delete the last occurrence of target in node. Constraints 0 ≤ n ≤ 100,000 where n is the number …
Category: algorithms
Teaching Kids Programming – Revisit the Symmetric Binary Tree by Using Clone and Invert Algorithm
January 22, 2021
algorithms, python, Recursion, teaching kids programming, youtube video
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Teaching Kids Programming: Videos on Data Structures and Algorithms We know how to invert a binary tree. We also learned how to check if a binary tree is symmetric. …
Math Algorithm to Count Substrings With All 1s
You are given a string s containing “1”s and “0”s. Return the number of substrings that contain only “1”s. Mod the result by 10 ** 9 + 7. Constraints …
Teaching Kids Programming – Recursive Algorithm to Determine if a Binary Tree is Symmetric
January 21, 2021
algorithms, python, Recursion, teaching kids programming, youtube video
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Teaching Kids Programming: Videos on Data Structures and Algorithms Given the root to a binary tree root, return whether it is symmetric. Constraints n ≤ 100,000 where n is …
Depth First Search Algorithm to Perform Phone Number Permutations
Given a string digits containing 2 to 9 inclusive, return in sorted lexicographic order all possible strings it could represent when mapping to letters on a phone dialpad. These …