1087 – Least Common Multiple of Two Numbers M and N 1. Problem Understanding Phase (Fully Understand the Requirements) The problem we need to solve is: to calculate the least common multiple of two positive integers M and N. The least common multiple is the smallest positive integer that can be divided by both M … Read more
Problem: Building Primary Schools in Mountainous Areas [Problem Description] The government has constructed a road in a mountainous area that passes through a total of m villages, visiting each village exactly once, without loops or intersections, and any two villages can only be accessed via this road. The distance between any two adjacent villages is … Read more
Content First, imagine memory as a three-story building: The first floor is the “Global Data Area” – the hall you see as soon as you enter; The second floor is the “Stack” – like a hotel front desk with a last-in-first-out drawer cabinet, opened and closed as needed; The third floor is the “Heap” – … Read more
4. C++ Basic Syntax (Core Exam Points) (1) Variables and Data Types The basic data types are high-frequency exam points in the preliminary exam, and we must remember their ranges to avoid overflow issues. In a 32-bit system, the situations for each basic data type are as follows: •int: occupies 4 bytes, with a value … Read more
Time Limit: 2s Memory Limit: 192MBProblem DescriptionCalculate the function value according to the following recursive formula.When x=1, f(x)=10; when x>1, f(x)=f(x-1)+2Input FormatInteger variable xOutput Formatf(x)Sample Input10Sample Output28Code(1) Recursive Version #include <iostream> using namespace std; int f(int x) { if (x == 1) { return 10; } else { return f(x – 1) + 2; }} … Read more
Have you ever encountered a situation where you need to generate all permutations, such as generating all arrangements of cards in game design? Students with a certain foundation in algorithms should be very adept at using the “recursion + backtracking” approach to solve such problems. However, Python has already implemented this for us, with the … Read more
The C language is essential knowledge in embedded learning, and most operations revolve around C language. Among them, there are three “hard nuts to crack” that are almost universally recognized. 1. Pointers Pointers are recognized as the most difficult concept to understand, and they are a direct reason many beginners choose to give up. The … Read more
In C language, the factorial is the result of multiplying all positive integers from large to small. The factorial of n is represented as n!. For example: 5! = 5 * 4 * 3 * 2 * 1 = 120 3! = 3 * 2 * 1 = 6 Here, 5! is read as “5 … Read more
Today’s algorithm problem is to solve the "Flatten Binary Tree to Linked List" algorithm using C language. Below are my algorithm ideas and implementations. Let's take a look. Algorithm Problem Given a binary tree, flatten it to a linked list. The flattened linked list should follow the preorder traversal of the original binary tree. Algorithm … Read more
Today's algorithm problem is to solve the "Identical Trees" algorithm using C language. Below are my algorithm ideas and implementation. Let's take a look. Algorithm Problem Given two binary trees, determine if they are identical. They are considered identical if they have the same structure and their node values are the same. Algorithm Idea The … Read more