Freaks City

This application was developed to process survey responses, particularly for handling Chinese text-based multiple-choice questions from platforms like Wenjuanxing. The system outputs responses as raw text strings, which need to be parsed for statistical analysis using binary or multinomial logistic regression models. The core functionality invo ...

U-Shaped String Output Given a string of length N, display it in a U-shape formation. Let n1 represent the left vertical column, n3 represent the right vertical column, and n2 represent the bottom horizontal row. The constraint requires n1 = n3 = max { k | k <= n2 for all 3 <= n2 <= N } and n1 + n2 + n3 - 2 = N. For example, with input ...

The word chain problem involves constructing the longest possilbe sequence ("dragon") from a given set of words, starting with a specified character. Each word may be used at most twice in the chain. When two words are joined, overlapping parts are merged into one—e.g., beast and astonish form beastonish. Importantly, no word in the c ...

This document details the solutions for problems from Codeforces Educational Round 166 (Rated for Div. 2). A. Verify Password The problem requires validating a password string based on specific criteria. The approach involves iterating through the password and checking adjacent character pairs against the rules. A password is valid if it adhere ...

Problem Overview This problem can be solved efficiently using interval dynamic programming. Given a string, the goal is to determine the minimum number of operations required to paint the entire string, where each operation can paint any contiguous segment. Dynamic Programming Formulation Define dp[l][r] as the minimum number of steps needed to ...

Core Concepts Regular expressions utilize predefined special characters (metacharacters), ordinary characters, and their combinations to create "pattern strings." These pattern strings validate whether given strings match specific filtering logic or extract desired portions from strings. Regular expressions exhibit these characteristi ...

Input Format: A single line of text ending with a period. Output Format: The lengths of all words separated by spaces, with no trailing space. Sample Input: It's great to see you here. Sample Output: 4 5 2 3 3 4 Approach 1: Using a Flag for First Output This approach uses a flag to track whether the current word is the first one being printed ...

Overveiw This article discusses several classic simulation problems that involve network string processing. Each problem requires parsing structured text, handling patterns, and implementing matching or replacement logic. The solution are written in C++ using standard libraries. Template Generation System The first problem involves a template e ...

Variable Deletion and Replacement Removing Prefix Patterns Removing the shortest matching prefix pattern using #: greeting="Hello World, Welcome to Shell" echo $greeting greeting_clean=${greeting#*or} echo $greeting_clean Removing the longest matching prefix pattern using ##: greeting_long=${greeting##*or} echo $greeting_long String ...