The Cornerstone of C Language In the vast universe of computer programming, the C language is undoubtedly a brilliant and unique star, radiating a lasting and dazzling light. Since its birth at Bell Labs in 1972, C has stood at the core of programming languages for over half a century, with a profound and widespread … Read more
Problem 1: Number FormationProblem Description Xiao R is learning string processing. Xiao X gave Xiao R a string s, which contains only lowercase letters and digits, and contains at least one digit from 1 to 9. Xiao X hopes that Xiao R can use any number of digits from s, in any order, to form … Read more
“From today on, study hard and make progress every day” Repetition is the best method for memory; spend one minute every day to remember the basics of C language. “Essential Knowledge Points for C Language Beginners: 100 Articles Series“ The following notes finally enter the practical series, which is also the most important and difficult … Read more
![C++ Problem P1200 [USACO1.1] Your Ride Is Here](https://boardor.com/wp-content/uploads/2025/11/9c5d8023-a9d7-4642-8005-095a1995ed75.jpg)
Click the blue text Follow us P1200 [USACO1.1] Your Ride Is Here Your Ride Is Here Problem Description As is well known, there is a UFO behind every comet. These UFOs often come to collect loyal supporters from Earth. Unfortunately, their flying saucers can only take one group of supporters at a time. Therefore, they … Read more
![GESP C++ Level 4 Real Questions (Sorting, String Processing) [202412] Character Sorting (luogu-B4069)](https://boardor.com/wp-content/uploads/2025/11/06bbb527-9c75-4c50-8b8e-c63de4393dc6.jpg)
GESP C++ Level 4 real questions for December 2024. This question mainly tests the application of sorting and string processing. The sorting uses the built-in function<span>sort</span> with a difficulty level of ⭐⭐★☆☆. This question is rated as<span>General-</span> on Luogu. GESP Level 1 Practice Question List GESP Level 1 Real Question List GESP Level 2 Practice … Read more
Click the blue text Follow us P1553 Number Reversal (Upgraded Version) Problem Background The following is the original problem statement for reference: Given a number, please reverse the digits of the number to obtain a new number. This time, unlike the first question of the NOIp2011 popular group, this number can be a decimal, fraction, … Read more
Follow and Star the Official Account, Don’t Miss Out on Exciting Content! For a long time, I’ve wanted to create a small tool that consolidates the little functions I’ve used over the years. It turned out to be quite a hassle, taking up a lot of time intermittently. At my age nearing forty, there isn’t … Read more
Day 14 – Regular Expressions Regular Expressions (RE), also known as regex, are commonly used to search for and replace strings that match certain patterns. Regular Expression Syntax When processing strings, it often involves finding strings that meet certain complex rules. Regular expressions are a language used to describe these rules, allowing for matching, searching, … Read more
Background Story In the microscopic world of life, geneticists are working to decode the code of life – the DNA sequence. They have discovered that a specific gene expression process requires two key proteins to appear in a specific order to be activated. They refer to these two proteins as “guide protein” (denoted by the … Read more
This is a guide to overcoming key challenges in the GESP C++ Level 3 exam, summarizing core knowledge points, high-frequency exam topics, and preparation suggestions based on the exam syllabus and analysis of past exam questions, helping candidates to review efficiently: 1. Core Challenges and High-Frequency Topics 1. Data Encoding and Base Conversion Two’s Complement/One’s … Read more