Typical of Divide and Conquer Algorithm There is a pile of coins, containing one counterfeit coin. The counterfeit coin is lighter than the genuine coins. How can we quickly find the counterfeit coin using a balance? By comparing them two by two until a lighter coin is found? Divide into two piles, find the lighter … Read more
Fibonacci Sequence The Fibonacci sequence, also known as the golden ratio sequence, is defined as follows: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, …. Mathematically, the Fibonacci sequence is defined recursively: F0 = 0 (n=0) F1 = 1 (n=1) Fn = F[n-1]+ F[n-2](n=>2) 1. Implementing the Fibonacci Sequence in Python 1. Using … Read more
C language functions are the core of code modularization and are frequently tested by interviewers. From parameter passing details to memory management, from recursive logic to pointer applications, each knowledge point may hide “pits”. Today, I have compiled 10 function-related interview questions that cover 80% of commonly tested scenarios to help you quickly pass the … Read more
Introduction to C Language | Lecture 7: Complete Guide to Functions and Program Structure 💡 Foreword: If variables are the building blocks of a program, then functions are the rooms of the building. This article will take you from zero to fully understand functions and program structure in C language. Whether you are a beginner … Read more
Concept of Recursion Recursion is an important technique in programming, referring to a process or function that calls itself directly or indirectly in its definition. Implementing recursion in assembly language requires a deep understanding of stack operations and the function calling mechanism. Types of Recursion 1. Direct Recursion The process calls itself directly 2. Indirect … Read more
Today is the 853rd day of learning programming with the cool rain! Hello, everyone! This is the problem from the CSP-J2025 Preliminary Round. Day 853 CSP2025-J Preliminary Round Problem 3 Answer: B START OF SPRING The problem tests the use of recursive functions 20 25 9 SEPTEMBER Day Monday Tuesday Wednesday Thursday Friday Saturday Sunday … Read more
1208 – Spiral Matrix Program Development Approach 1. Problem Analysis This program attempts to generate an n×n spiral matrix using a recursive method. The spiral matrix starts from the top-left corner (1,1) and fills numbers in a clockwise direction (right → down → left → up). 2. Algorithm Selection The program uses a depth-first search … Read more
1208 – Spiral Matrix Program Development Approach 1. Problem Analysis This program attempts to generate an n×n spiral matrix using a recursive method. A spiral matrix is a matrix filled with numbers in a clockwise direction from the outside in, with the outer layer filled first, followed by recursive processing of the inner layers. 2. … Read more
1196 – Corner I 1. Problem Understanding Phase (Corner Matrix Problem) We need to print a special N×N matrix characterized by: The diagonal from the top left to the bottom right corner and the area above it, where each element’s value equals its column index The area below the diagonal, where each element’s value equals … Read more
1222 – Classic Recursive Problem – Tower of Hanoi 1. Problem Understanding Phase (Tower of Hanoi Problem) The Tower of Hanoi problem is a classic recursive problem with the following rules: There are three rods (A, B, C), and rod A has n disks of different sizes. Only one disk can be moved at a … Read more