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4,592
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to rotate the positions of the panes within a window in a Tmux session. Tmux is a terminal mu...
1,385
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a custom error type in Rust to handle specific error scenarios in a file processing application. Your custom...
956
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a bit manipulation function in Rust. The function should modify a specific bit within a given value and ...
4,999
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a custom type system for a programming language. The type system should support pointers and arrays. You...
4,769
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with simulating a simple traffic light system using Rust programming language. The system consists of three traffic lights...
3,263
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a trait for a multi-segment shape in Rust. The trait `Multisegment` represents a shape composed of multi...
3,282
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust program that reads and processes a configuration file. The configuration file is in the TOML format a...
3,016
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a Rust enum and a method to retrieve the enumerated values. The enum represents different external modes...
2,375
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are working on a game development project where you need to implement a unit management system. The provided code snippet is part of ...
1,205
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple server management system using Rust. The system will involve setting up a server, configuring a...
2,404
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple volume management system for a media player application. The provided code snippet is part of a...
1,692
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with simulating the behavior of a linear counter for a virtual audio processing unit. The linear counter is used to contro...
777
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust program that utilizes the `wayland_commons` and `wayland_sys` crates to interact with the Wayland dis...
2,344
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simplified version of a Pay-to-Public-Key-Hash (P2PKH) script in Rust. The P2PKH script is a commonly ...
1,119
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a custom data structure called `IdVec` in Rust. The `IdVec` is a vector that can be indexed by a newtype...
3,233
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function that calculates the length of a substring within a given input string. The function should ta...
1,402
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are given a list of daily temperatures in a particular location. Your task is to write a function to calculate the number of days you...
2,958
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a sensor data processing module for a smart home system. The module is responsible for processing data f...
912
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a graphical user interface (GUI) application using the FLTK library in Rust. The application should display ...
3,125
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function that creates a graphical user interface (GUI) window using the Wayland protocol. Wayland is a...
1,278
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to format exponential numbers based on certain criteria. The function should take an input nu...
4,767
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a program that simulates a simple messaging system. The program should handle different types of messages an...
4,653
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a custom iterator in Rust that generates Fibonacci numbers. The `Fib` struct has already been defined wi...
4,522
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to retrieve elements from a Java `PermissionCollection` using the provided Rust code snippet ...
1,305
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a custom data structure that mimics the behavior of the code snippet provided. Your data structure shoul...
2,304
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with designing a smart contract function for a decentralized finance (DeFi) platform. The function is responsible for allo...
815
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function that processes a series of input pairs and constructs a specific data structure based on the ...
3,713
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust program that processes a list of strings and performs various operations on them. Your program should...
736
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a network data transfer monitoring system. Your goal is to create a program that tracks the amount of da...
1,142
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a custom lazy initialization mechanism for a data structure in Rust. The provided code snippet includes ...
3,414
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to rotate a 2D pixel buffer 270 degrees clockwise. The pixel buffer is represented as a 1D ar...
2,016
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a program to manage a hierarchical structure of view components in a graphical user interface (GUI) applicat...
1,255
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple register manipulation system for a microcontroller. The provided code snippet is a part of a re...
600
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simplified version of a network connector system in Rust. The system involves setting up a connector w...
1,760
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a function that downloads a file from a given path. The function should handle both absolute and relative fi...
2,008
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a custom error handling system in Rust. Your goal is to create a structure for representing errors and a...
4,184
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a configuration struct for a genetic algorithm in Rust. The struct, named `GeneticAlgorithmConfig`, cont...
220
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are working on a game development project and are responsible for implementing serialization and deserialization functions for variou...
4,908
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a module for a video streaming platform called \"vlive\". The module should handle various functionaliti...
1,935
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple GUI library for a game interface. The library provides a `Style` struct that defines the visual...
4,744
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a builder pattern for a specific output type in a Rust application. The given code snippet is a part of ...
4,390
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a program that processes and validates OpenAPI (formerly known as Swagger) specifications. OpenAPI is a spec...
4,004
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a custom list queue data structure in Rust. The list queue should support the following operations:\n1. ...
3,738
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a system for managing widgets in a game engine. The game engine uses the ECS (Entity-Component-System) a...
3,920
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a key generation system for a secure application. The system is designed to generate cryptographic keys ...
1,658
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a message queuing system using the amiquip library in Rust. The code snippet provided is a part of this ...
2,361
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust function that processes a list of notifications and logs any errors encountered during the notificati...
3,464
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a partial key collector data structure in Rust. The `PartialKeyCollector` struct is designed to store pa...
4,877
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function that performs linear interpolation on a given set of source values. Linear interpolation is a...
1,563
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to find the upper bound of a given key in a binary search tree. The function `upper_bound` ta...
3,377
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a command-line interface (CLI) help message parser. The help message is structured as follows:\n\n```\nU...
2,578
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple enum and associated methods in Rust to handle protocol disabling options for network frames. Th...
1,497
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a recursive function to select an element from an array based on a set of indices. The function takes in...
4,330
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a trait for decoding a custom enum type in Rust. The enum `PowerStatus` represents the power state of a ...
4,265
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a command-line interface for a simple text-based application. The application should support a set of pr...
1,830
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a custom parser for a simplified list operation language. The language consists of two types of operatio...
4,165
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to parse Erlang record headers. In Erlang, records are a way to store a fixed number of eleme...
221
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a custom error type in Rust for a WebAssembly (Wasm) compiler. The error type should be able to display an e...
4,378
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple in-memory database system that supports case-insensitive record retrieval. The database system ...
4,770
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a Rust function to calculate the humidity from a sensor reading. The sensor communicates over I2C and re...
2,243
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a module dependency resolution algorithm for a software project. The project consists of several modules...
3,321
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple register accessor for a microcontroller's peripheral register. The provided code snippet is a p...
1,816
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a configuration parser for a server application. The configuration is represented by the `Options` struc...
2,696
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to calculate the incomplete value of a given number. An incomplete value of a number is defin...
692
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are given a function `valid_count` that takes a string as input. The string consists of multiple lines, where each line contains a sp...
3,623
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a Rust module to convert a given integer into its equivalent Roman numeral representation. Roman numeral...
4,122
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function that manipulates pointers and ownership in Rust. The function takes a mutable pointer to a `V...
854
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple file caching mechanism using Rust. The cache should store the contents of files and provide a w...
412
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are working on a codebase for a file management system, and you need to implement a function that adds files to an output corpus. The...
1,869
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple routing system for a web server. The server receives HTTP requests and needs to match the incom...
156
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are given a simplified representation of a compiler optimization pass that eliminates unnecessary register copies in a program. The c...
1,924
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust function that calculates the total duration of a series of time intervals represented in seconds. The...
1,318
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a program that processes a given tuple and prints out specific values from it. The tuple contains elements o...
309
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust program that interacts with the X server using the XCB library. Your goal is to implement a function ...
3,474
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a parser for network-related data using the Rust programming language. The given code snippet is part of...
3,741
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are given a function that takes an integer `n` as input. The function is intended to generate a specific sequence of numbers based on...
3,647
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a room selection feature in a chat application. The application has a `RoomsWidget` module that handles ...
451
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are given a code snippet that iterates over a vector containing elements `a`, `b`, and `c`. Your task is to write a function that tak...
3,820
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are given a list of words and a target word. Your task is to write a function that takes the list of words and the target word as inp...
4,800
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a trait and associated methods for a custom type in Rust. The trait, `A`, has a method `foo` that takes ...
3,720
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are given a function `find_palindrome` that takes a string `s` and two indices `i` and `j` as input. The function is designed to find...
919
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a generic function that takes a value of type `S` and converts it into a `String`. The function signatur...
3,280
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing the game of life, a cellular automaton devised by the British mathematician John Horton Conway. The game...
4,782
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function that checks whether a given word can be formed using the characters available in another word...
3,420
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are working on a text editor application and need to implement a feature for handling key button presses. The application uses the `n...
3,265
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a custom iterator trait in Rust that can iterate over a collection with a specific context. The trait `C...
465
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a generic data structure in Rust that can store elements of any type. The data structure should support ...
1,440
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a program that processes and archives URLs. The program should write intermediate results to an output file ...
1,234
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a custom derive macro for a struct builder in Rust. The macro should generate a builder pattern for the give...
3,212
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a mock mempool for a blockchain node. The mempool is a temporary storage area for valid transactions tha...
76
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a custom data structure in Rust that combines the functionality of a set and a mutable reference. Your t...
1,401
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple static web page generator in Rust. The generator should allow users to create static HTML eleme...
2,444
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function that processes policy sources and composes them into a single policy. Each policy source can ...
1,979
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a macro in Rust that generates a range of Unicode code points for private use. The Unicode standard rese...
1,171
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a file management system for generating and saving PDF documents. Your goal is to create a function that...
612
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a configuration system for managing blockchain networks. The configuration system should allow users to ...
1,598
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with simulating a simplified version of a progress bar for a file download. Your goal is to implement a function that take...
3,748
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a monitoring system for a client that senses various events and reports them. The client provides a meth...
4,073
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust program that processes and analyzes data from a JSON file. The JSON file contains information about d...
3,471
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple command-line utility that processes a list of URLs and checks their availability. The utility s...