Freaks City

Problem A Given a snacks to distribute equally among b people. Snacks cannot be divided. Find the minimum number of additional snacks that need to be purchased. Solution Each person requires ceil(a/b) snacks. Therefore, the total snacks needed is ceil(a/b) * b. The additional snacks required is ceil(a/b) * b - a. int snacks, people; std::cin &g ...

To implement a counter supporting both increment and reset operations in O(n) amortized time, we utilize a bit array along with a pointer tracking the position of the most significant set bit. The data structure maintains: A binary array bits representing the counter value An index top_bit pointing to the highest-order 1-bit For the increment ...

Setting Up Jupyter Notebook Launch Jupyter through a terminal session. Before starting, create and activate a dedicated Conda environment: conda create -n myenv python=3.10 conda activate myenv jupyter notebook Python Syntax Essentials Multiple statements can be placed on one line by separating them with a semicolon: print('hello'); print('wor ...

Two Sum Use a hash map to store each number’s index. For every element, check if the complement (target - current) exists in the map. class Solution: def twoSum(self, nums: List[int], target: int) -> List[int]: seen = {} for idx, val in enumerate(nums): complement = target - val if complement in se ...

Overview The B-Tree is a self-balancing search tree data structure designed for efficient storage and retrieval of sorted data. Unlike binary search trees, B-Trees can have multiple keys per node and multiple children, making them particularly well-suited for disk-based storage systems where reading large blocks of data is costly. Historical Ba ...

Unions and enums are two essential user-defined types in C that provide memory efficiency and code clarity, respectively. Union Declaration and Memory Layout A union groups multiple variables of different types into a single memory location. The compiler allocates enough memory to hold the largest member. All member share the same starting addr ...

Maximum Depth of a Binary Tree Given a binary tree, determine its maximum depth - the number of nodes along the longest path from the root node to the farthest leaf node. Recursive Approach Using postorder traversal (left-right-root) to calculate node height: struct TreeNode { int val; TreeNode* left; TreeNode* right; TreeNode(i ...

Arrays are data structures used to store multiple values of the same type in contiguous memory locations, each accessible via a zero-based index. They eliminate the need for declaring numerous individual variables when handling collections of data, such as storing grades for multiple students. Declaring and Initializing Arrays Arrays can be dec ...

Map Declaration Maps in Go are similar to dictionaries in Python. To declare a map, use the following syntax: var mapVariable map[keyType]valueType In this declaration: keyType defines the data type of keys valueType defines the data type of corresponding values By default, map variables are initialized to nil. Memory allocation requires the ...

Problem 1: Kth Largest Element in an Unsorted Array Goal Locate the k-th largest value in a integer array that is not pre-sorted. Example Input: [3, 2, 1, 5, 6, 4], k = 2 Output: 5 Optimized Java Implementation import java.util.Random; public final class KthLargestFinder { private static final Random RNG = new Random(); public int ...