Given integers n and k, find the k-th smallest number in lexicographical order from 1 to n. The approach involves calculating steps between lexicographical numbers and intelligently skipping subtrees, avoiding memory issues caused by storing all numbers.
This solution in JavaScript computes all possible results from adding parentheses in different ways to a mathematical expression containing numbers and operators (+, -, *). It uses recursive partitioning to divide the expression at each operator, recursively computes the left and right sub-expressions, and then combines the results based on the operator.
In this post, we solve LeetCode problem 1684, Count the Number of Consistent Strings, using JavaScript. We convert the allowed string into a set for efficient lookups and iterate over each word to check if all characters are in the allowed set. If a word is consistent, we increment the count.
In LeetCode Problem 2807, the task is to modify a given linked list by inserting nodes containing the Greatest Common Divisor (GCD) of consecutive nodes between each pair. This involves calculating the GCD of two numbers using the Euclidean algorithm, then iterating through the linked list to insert the computed GCD nodes between existing nodes.
Spiral Matrix IV presents a fascinating challenge on LeetCode: transforming a linked list into a spiral matrix. This problem requires a methodical approach to efficiently traverse the matrix and populate it with the linked list’s values. In this blog post, we’ll break down the problem’s intricacies, explore different solution strategies, and provide a well-commented Python implementation.
To solve “1367. Linked List in Binary Tree” in JavaScript, we use Depth-First Search (DFS) to traverse the binary tree and check if the linked list exists as a downward path starting from any node. We implement a recursive function to match the linked list with the tree nodes. If a match is found, we return true.
