problem stringlengths 75 4.24k | source stringclasses 1
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value | difficulty int64 1 10 | difficulty_reasoning stringlengths 228 801 | __original_row_idx int64 0 999 | r1_distill_70b_response stringlengths 935 66.5k | conversations listlengths 2 2 |
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Write a function in HTML for creating a table of n rows and m columns. The table should have alternating row colors, with odd rows colored in light gray and even rows colored in white. Additionally, each cell in the table should have a border of 1px and a padding of 5px. The table should also have a header row with a d... | codefeedback | code | 2 | The problem requires basic HTML and CSS knowledge to create a table with specific styling and validation conditions. It mainly involves straightforward implementation of alternating row colors and basic input validation, which fits the criteria for a Level 2 problem. | 4 | <think>
Alright, let's break down how I approached solving this problem. The user asked for a function in HTML that creates a table with specific styling and validation.
First, I considered the structure of the HTML. I knew I needed a function, so I decided to use JavaScript since it's the scripting language for HTML... | [
{
"from": "human",
"value": "Write a function in HTML for creating a table of n rows and m columns. The table should have alternating row colors, with odd rows colored in light gray and even rows colored in white. Additionally, each cell in the table should have a border of 1px and a padding of 5px. The tab... |
Write a function to find the number of occurrences of an element in a list, but without using any built-in functions or libraries. The list may contain duplicate elements and can have a maximum length of 1000. The function should be able to handle negative integers and floats as elements in the list. The function shoul... | codefeedback | code | 2 | The problem involves a basic implementation where one needs to iterate through a list and count occurrences of a given element. This requires a straightforward loop and conditional checks, aligning well with the ICPC Level 2 category, which describes problems involving basic data structures and simple algorithms. | 3 | <think>
Okay, I need to write a function called count_occurrences that counts how many times a given element appears in a list. The constraints are that I can't use any built-in functions or libraries. Hmm, the list can have up to 1000 elements, which isn't too bad. So I need to make sure it's efficient, like O(n) time... | [
{
"from": "human",
"value": "Write a function to find the number of occurrences of an element in a list, but without using any built-in functions or libraries. The list may contain duplicate elements and can have a maximum length of 1000. The function should be able to handle negative integers and floats as... |
Read the JSON string below and convert it into a dictionary. After converting the JSON string into a dictionary, iterate through each key-value pair in the dictionary and perform the following operations:
1. If the key is 'name', check if the value is a string. If it is not a string, raise an exception with an appropri... | codefeedback | code | 4 | The problem requires knowledge of JSON handling and basic data validation techniques. It involves reading a JSON string, parsing it, and implementing multiple checks for different data types and specific conditions related to the values. These tasks combine basic implementation with more advanced data validation concep... | 9 | <think>
Alright, I need to help the user with a programming problem. They've provided a JSON string and want to convert it into a dictionary. Then, they have to iterate through each key-value pair and perform several checks.
First, I'll start by converting the JSON string into a dictionary. That's straightforward usin... | [
{
"from": "human",
"value": "Read the JSON string below and convert it into a dictionary. After converting the JSON string into a dictionary, iterate through each key-value pair in the dictionary and perform the following operations:\n1. If the key is 'name', check if the value is a string. If it is not a s... |
Write a SQL query to find the total number of orders placed between two given dates, group the results by the month in which the orders were placed, and include only orders with a total cost greater than $100. start_date = '2020-01-01' end_date = '2020-02-01'.
Reference: Unfortunately, there is an error in the given c... | codefeedback | code | 3 | The problem requires a basic understanding of SQL querying, including grouping, filtering with conditions, and using date ranges. While it involves grouping results and applying a condition on the total cost, it does not require advanced algorithms or data structures, making it suitable for level 3. | 0 | <think>
Alright, I need to help the user fix their SQL query. They mentioned that their current code is giving incorrect results, so I should figure out what might be going wrong.
First, I should understand their requirements. They want to find the total number of orders placed between two dates, group them by month,... | [
{
"from": "human",
"value": "Write a SQL query to find the total number of orders placed between two given dates, group the results by the month in which the orders were placed, and include only orders with a total cost greater than $100. start_date = '2020-01-01' end_date = '2020-02-01'.\n\nReference: Unfo... |
Count the number of vowels in the string and return a dictionary where the keys are the vowels and the values are the counts of each vowel. However, you are not allowed to use any built-in functions or libraries that directly count the number of vowels in the string.
text = "Hello World!"
For example, for the given t... | codefeedback | code | 2 | The problem requires familiarity with basic data structures (dictionaries) and simple iteration through a string to count vowels. It involves basic conditional checking for vowel characters, making it a straightforward implementation rather than requiring any advanced algorithms or data structures. | 7 | <think>
Okay, I need to solve this problem where I have to count the number of each vowel in a given string and return a dictionary with the counts. The string provided is "Hello World!", but I think the solution should work for any string. Also, the problem says I can't use any built-in functions that directly count t... | [
{
"from": "human",
"value": "Count the number of vowels in the string and return a dictionary where the keys are the vowels and the values are the counts of each vowel. However, you are not allowed to use any built-in functions or libraries that directly count the number of vowels in the string.\n\ntext = \... |
Write a SQL query to find all the users in a database who have an age greater than 25 and whose first name starts with the letter 'J'. Additionally, the query should only return users whose last name ends with the letter 's'.
Furthermore, the query should return the users in descending order of their ages. | codefeedback | code | 2 | This problem involves basic operations with SQL, including filtering records based on specific conditions (age, first name, last name) and sorting output. It tests understanding of basic SQL syntax and operations, which aligns with level 2 as it requires some knowledge of data structures (tables) and simple querying te... | 24 | <think>
Okay, I need to write a SQL query based on the user's question. Let me break down what they're asking for.
First, they want to find all users with an age greater than 25. So I'll need a WHERE clause with Age > 25.
Next, the first name should start with 'J'. I'll use the LIKE operator for that, checking if Fir... | [
{
"from": "human",
"value": "Write a SQL query to find all the users in a database who have an age greater than 25 and whose first name starts with the letter 'J'. Additionally, the query should only return users whose last name ends with the letter 's'. \nFurthermore, the query should return the users in d... |
Create a C++ program for randomly shuffling an array of integers without using any built-in shuffling functions or algorithms. Additionally, ensure that the program is able to handle arrays of any size, including very large arrays. However, you are not allowed to use any additional data structures or extra memory to ac... | codefeedback | code | 6 | The problem requires creating a custom algorithm to shuffle an array without built-in functions or additional data structures, which involves understanding and implementing concepts related to randomization algorithms (such as the Fisher-Yates shuffle). This level of problem requires a good grasp of algorithmic techniq... | 12 | <think>
Alright, the user wants a C++ program that shuffles an array of integers without using built-in functions or algorithms. Plus, it needs to handle large arrays without extra memory. Hmm, okay, so I can't use something like std::shuffle, right? I need to implement the shuffling manually.
First thought: the Fishe... | [
{
"from": "human",
"value": "Create a C++ program for randomly shuffling an array of integers without using any built-in shuffling functions or algorithms. Additionally, ensure that the program is able to handle arrays of any size, including very large arrays. However, you are not allowed to use any additio... |
Edit the following code to add a try-except block that handles the specific exception of ValueError and prints a custom error message when the input values cannot be converted to integers. Additionally, modify the code to handle a KeyboardInterrupt exception and terminate the program gracefully when the user interrupts... | codefeedback | code | 2 | The problem is a basic implementation issue that involves handling user input and exceptions, which requires understanding of basic programming concepts like try-except blocks. It doesn't involve complex data structures or algorithms, thus fitting more into the level 2 category. | 2 | <think>
Okay, so I need to help modify this code by adding try-except blocks. The user wants two specific exceptions handled: ValueError and KeyboardInterrupt. Let me break down what's required.
Starting with the original code. It takes two inputs, x and y. Then it tries to convert them to integers and add them. The e... | [
{
"from": "human",
"value": "Edit the following code to add a try-except block that handles the specific exception of ValueError and prints a custom error message when the input values cannot be converted to integers. Additionally, modify the code to handle a KeyboardInterrupt exception and terminate the pr... |
Write a SQL query to find the names, job titles, and salaries of all employees working at a given department, sorted by salary in descending order. Additionally, include the average salary, minimum salary, and maximum salary of all employees in the same department in the result set. | codefeedback | code | 3 | The problem requires knowledge of SQL queries, particularly understanding how to filter and aggregate data (to find names, job titles, and salaries, as well as average, minimum, and maximum salaries). It also involves sorting results, which adds complexity but not to the extent of requiring advanced algorithms or data ... | 30 | <think>
Alright, so I need to write a SQL query that finds the names, job titles, and salaries of all employees in a specific department. Plus, I have to include the average, minimum, and maximum salaries of that department. And then sort everything by salary, from highest to lowest. Hmm, okay, let me break this down.
... | [
{
"from": "human",
"value": "Write a SQL query to find the names, job titles, and salaries of all employees working at a given department, sorted by salary in descending order. Additionally, include the average salary, minimum salary, and maximum salary of all employees in the same department in the result ... |
Edit the code to create a try-except block to handle the exception and include a custom error message. The custom error message should indicate the specific variables that were involved in the division. Additionally, modify the code to ensure that the program continues running even if an exception occurs, and print the... | codefeedback | code | 2 | The problem requires basic understanding of exception handling in Python and managing lists. It involves simple implementation of a try-except block and basic arithmetic operations (division), which can be classified as level 2 according to the provided difficulty scale. | 11 | <think>
Okay, I need to edit the given code by adding a try-except block to handle exceptions, especially ZeroDivisionError. The error messages should mention the specific variables involved. Also, the program should continue running even if an error occurs. Let me look at the code.
The code has two lists, a and b, ea... | [
{
"from": "human",
"value": "Edit the code to create a try-except block to handle the exception and include a custom error message. The custom error message should indicate the specific variables that were involved in the division. Additionally, modify the code to ensure that the program continues running e... |
Create a C# program which takes two strings as parameters, and returns true if the two strings are anagrams of each other. An anagram is a word or phrase formed by rearranging the letters of another word or phrase. The program should have a time complexity of O(nlogn) and a space complexity of O(n). Additionally, the p... | codefeedback | code | 3 | This problem involves basic string manipulation and sorting, which aligns with standard algorithms like sorting (O(n log n)). It requires a moderate understanding of data structures and algorithms but does not involve complex concepts or advanced algorithms. Thus, it fits well into Level 3. | 8 | <think>
Okay, so I need to create a C# program that checks if two strings are anagrams of each other. Hmm, anagrams are words where you can rearrange the letters to get the other word. Like "listen" and "silent".
The problem says the solution should have a time complexity of O(n log n) and space complexity of O(n). O... | [
{
"from": "human",
"value": "Create a C# program which takes two strings as parameters, and returns true if the two strings are anagrams of each other. An anagram is a word or phrase formed by rearranging the letters of another word or phrase. The program should have a time complexity of O(nlogn) and a spac... |
Implement a function to check if a given string is a valid palindrome. The function should return True if the string is a valid palindrome, and False otherwise. A valid palindrome is a string that reads the same forwards and backwards, ignoring any non-alphabetic characters and considering only lowercase alphabets. The... | codefeedback | code | 2 | The problem involves checking for palindromes, requiring basic string manipulation and handling non-alphabetic characters while checking for equality in a case-insensitive manner. The solution can be achieved using straightforward techniques such as filtering the input and comparing characters, which are typical for le... | 25 | <think>
Okay, I need to implement a function to check if a given string is a valid palindrome. The function should return True if it's a palindrome and False otherwise. And the thing is, it should ignore non-alphabetic characters and only consider lowercase letters. Oh right, and the time complexity should be O(n), whi... | [
{
"from": "human",
"value": "Implement a function to check if a given string is a valid palindrome. The function should return True if the string is a valid palindrome, and False otherwise. A valid palindrome is a string that reads the same forwards and backwards, ignoring any non-alphabetic characters and ... |
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