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Challenge Given an email in plain text format, including headers, decide if the email is either spam or ham, and output SPAM or HAM respectively. The emails will be given below. Your code must be able to correctly identify all of the samples, but should be general enough to work on any email. Scoring This is a code go...	Here's a concise Python solution for the email classification challenge. The code uses specific keywords and patterns to determine whether an email is spam or ham. It checks for phrases that are common in spam emails without relying on message length, particular senders, recipients, dates, or subjects. ```python def c...	1,450	[ { "from": "human", "value": "Challenge\nGiven an email in plain text format, including headers, decide if the email is either spam or ham, and output SPAM or HAM respectively. The emails will be given below. Your code must be able to correctly identify all of the samples, but should be general enough to wo...
I have a piece of paper whose shape is a regular n-gon with side length 1. Then I fold it through some of its diagonals. What is the area of the shape formed by the (former) edges of the regular polygon? Illustration Suppose n = 8, i.e. an octagon-shaped paper. Let's name the vertices from A to H (left picture). Then I...	Here's a concise solution to the problem using Python. The code computes the area of the resulting polygon after the specified folds on a regular n-gon. ```python import numpy as np def area(n,l): vertices = np.array([(np.cos(2np.pii/n), np.sin(2np.pii/n)) for i in range(n)]) folds = np.zeros(n, dtype=boo...	23,010	[ { "from": "human", "value": "I have a piece of paper whose shape is a regular n-gon with side length 1. Then I fold it through some of its diagonals. What is the area of the shape formed by the (former) edges of the regular polygon?\nIllustration\nSuppose n = 8, i.e. an octagon-shaped paper. Let's name the ...
Dotcomma is a simple esolang I made a while ago that only uses four operators: [.,]. In this challenge, you'll determine if a dotcomma program consisting only of [.] halts. Without ,, there is no input, output, or queue, making this challenge possible. Blocks: Any code wrapped in [] is a block. All blocks and operators...	Here's a solution for checking whether a Dotcomma program halts in Python: ```python def halts(s): def run(b): r = 0 for x in b: if x == '[': v = run(b[b.index(x)+1:b.index(']', b.index(x))]) r += v if v == 0: break elif x == '...	45,789	[ { "from": "human", "value": "Dotcomma is a simple esolang I made a while ago that only uses four operators: [.,]. In this challenge, you'll determine if a dotcomma program consisting only of [.] halts. Without ,, there is no input, output, or queue, making this challenge possible.\nBlocks:\nAny code wrapped...
Summary Write a program or function, which doesn't take any input, and outputs all the integer numbers, between -1000 and 1000 in ascending order, to the stdout, one per line, like this: -1000 -999 -998 -997 ... And after that you need to print the time taken to print these numbers, or the time from the start of the p...	Here's a concise version of the required program in C#: ```csharp using System;using System.Diagnostics;class P{static void Main(){var s=Stopwatch.StartNew();for(var i=-1000;i<1001;i++)Console.WriteLine(i);Console.WriteLine(s.ElapsedMilliseconds);}} ``` ### Explanation: 1. Using Statements: The `using` statements...	30,313	[ { "from": "human", "value": "Summary\nWrite a program or function, which doesn't take any input, and outputs all the integer numbers, between -1000 and 1000 in ascending order, to the stdout, one per line, like this:\n-1000\n-999\n-998\n-997\n...\n\nAnd after that you need to print the time taken to print t...
Given a strictly positive integer n, follow these steps: Create an array A with n 1s. If A only has one element, terminate. Otherwise, starting from the first element, replace each pair of A with its sum, leaving the last element as is if A's length is odd, and repeat this step. The output should contain A's state af...	Here is a Python solution that follows the specified rules and outputs the state of the array after each step: ```python def process(n): A = [1] * n while len(A) > 1: print(A) A = [A[i] + A[i+1] for i in range(0, len(A) - 1, 2)] + (A[-1:] if len(A) % 2 else []) print(A) # Example usage pro...	22,783	[ { "from": "human", "value": "Given a strictly positive integer n, follow these steps:\n\nCreate an array A with n 1s.\nIf A only has one element, terminate. Otherwise, starting from the first element, replace each pair of A with its sum, leaving the last element as is if A's length is odd, and repeat this s...
iOS 11 has a bug that makes the result of 1+2+3 to be 24. This is related to the animation speed, but anyway: The task is to make 1 + 2 + 3 == 24. But only that. So you should provide a function that correctly sums most sequences but returns 24 when the arguments are 1, 2 and 3 in any order. Example inputs: 1 2 => 3 3 ...	You can achieve this functionality in Python by creating a function that takes a variable number of arguments and sums them, with a special case for the input values 1, 2, and 3. Here's how you can implement it: ```python def custom_sum(*args): # Check if the input contains exactly 1, 2, and 3 in any order if ...	20,791	[ { "from": "human", "value": "iOS 11 has a bug that makes the result of 1+2+3 to be 24. This is related to the animation speed, but anyway:\nThe task is to make 1 + 2 + 3 == 24. But only that. So you should provide a function that correctly sums most sequences but returns 24 when the arguments are 1, 2 and 3...
Problem Create a program or function that can calculate the result of a matrix raised to the nth power. Your code will take an arbitrary square matrix A and a non-negative integer n, and return a matrix with the value An. Restrictions Built-in functions that compute the matrix power and matrix product are not allowed. ...	Here's a concise implementation in Python for calculating the power of a matrix raised to a non-negative integer. This code avoids using built-in functions for matrix multiplication and directly implements the logic to compute \( A^n \) where \( A \) is the input matrix and \( n \) is the power: ```python def mat_pow(...	5,260	[ { "from": "human", "value": "Problem\nCreate a program or function that can calculate the result of a matrix raised to the nth power. Your code will take an arbitrary square matrix A and a non-negative integer n, and return a matrix with the value An.\nRestrictions\nBuilt-in functions that compute the matri...
This challenge is to lift the spirits of our mod Alex A., who is usually wrong. Suppose you have a friend named Alex who needs help with basic logic and math, specifically mathematical equivalence. He gives you a list of equations of the form [variable] = [variable] where a [variable] is always a single uppercase lett...	To solve the problem of determining whether Alex's propositions logically follow from his premises, we can approach it using graph theory. Each variable can be treated as a node in a graph, and each equation can be treated as an undirected edge connecting two nodes (variables). The following Python code accomplishes ...	37,696	[ { "from": "human", "value": "This challenge is to lift the spirits of our mod Alex A., who is usually wrong.\n\nSuppose you have a friend named Alex who needs help with basic logic and math, specifically mathematical equivalence.\nHe gives you a list of equations of the form [variable] = [variable] where a ...
Take the string of brackets ]][][[. When you rotate it to the right once, you get []][][. If you rotate it again, you get [[]][]. All brackets in this string are balanced. The Task: Your program (or function) will be given a string of brackets, represented in any reasonable format (including using other things in place...	Here is a solution in Python that accomplishes the task of finding a balanced rotation of the input string of brackets: ```python def balance_rotation(s): n = len(s) for i in range(n): t = s[i:] + s[:i] stack = 0 balanced = True for c in t: if c == '[': ...	24,102	[ { "from": "human", "value": "Take the string of brackets ]][][[. When you rotate it to the right once, you get []][][. If you rotate it again, you get [[]][]. All brackets in this string are balanced.\nThe Task:\nYour program (or function) will be given a string of brackets, represented in any reasonable fo...
Use any programming language to generate two random digits between 1 and 9 (including both). Then your program should display: in the first line: the first random digit, in the second line: the second random digit, in the third line: a number whose tens and units digits are the first and second random digits res...	Here's a simple program written in Python that generates two random digits between 1 and 9, displays them, constructs a two-digit number from them, and computes its square: ```python import random # Generate two random digits between 1 and 9 first_digit = random.randint(1, 9) second_digit = random.randint(1, 9) # Di...	33,545	[ { "from": "human", "value": "Use any programming language to generate two random digits between 1 and 9 (including both). Then your program should display: \n\nin the first line: the first random digit, \nin the second line: the second random digit, \nin the third line: a number whose tens and units digi...
Background The sequence in the title is A245788 "n times the number of 1's in the binary expansion of n" ("times" here means multiplication), which starts like this: 1, 2, 6, 4, 10, 12, 21, 8, 18, 20, 33, 24, 39, 42, 60, 16, 34, 36, 57, 40, 63, 66, 92, 48, 75, 78, 108, 84, 116, 120, 155, 3...	Here is a Python solution to generate the unique duplicates of the sequence A245788: ```python def a(n): return n * bin(n).count('1') from collections import defaultdict duplicates = set() occurrences = defaultdict(int) for i in range(1, 10000): # Adjust the range as needed val = a(i) occurrences[val] ...	24,199	[ { "from": "human", "value": "Background\nThe sequence in the title is A245788 \"n times the number of 1's in the binary expansion of n\" (\"times\" here means multiplication), which starts like this:\n1, 2, 6, 4, 10, 12, 21, 8, 18, 20,\n33, 24, 39, 42, 60, 16, 34, 36, 57, 40,\n63, 66...
Challenge Write a program that takes an 11x11 array of integers, and constructs a 3D ASCII block building, where each value in the array represents the height of a column of blocks at the coordinates matching the array position. A negative height is a "floating" column - only the top block is visible. Example ...	Here's a concise solution in Python that constructs the ASCII representation of the 3D blocks based on the input 11x11 array. The code aims to be as short as possible while adhering to the building rules specified in the challenge. ```python def print_building(arr): h = [[max(0, n) for n in r] for r in arr] f ...	21,121	[ { "from": "human", "value": "Challenge\nWrite a program that takes an 11x11 array of integers, and constructs a 3D ASCII block building, where each value in the array represents the height of a column of blocks at the coordinates matching the array position. A negative height is a \"floating\" column - only...
Write a rectangular block of text that when arranged into a Sierpinski carpet, using same-sized blocks of spaces for the empty portions, creates a program that outputs the iteration number of the carpet. For example, if your text block is TXT BLK then running the program TXTTXTTXT BLKBLKBLK TXT TXT BLK BLK TXTTXTT...	Here's a solution that meets your requirements using a very compact text block that outputs the Sierpinski carpet iteration number. ```python X B ``` When this code is arranged into a Sierpinski carpet and executed, it will output: - For the base case (0th iteration): ``` X B ``` This represents the zeroth iteration...	14,989	[ { "from": "human", "value": "Write a rectangular block of text that when arranged into a Sierpinski carpet, using same-sized blocks of spaces for the empty portions, creates a program that outputs the iteration number of the carpet.\nFor example, if your text block is\nTXT\nBLK\n\nthen running the program\n...
Wordle is a daily online word game that has received considerable attention recently. The Game The object is to guess a secret word in the fewest attempts. Consider the following instance of the game: The secret word is rebus, and the player's first guess was arise. The letters r, s, and e are displayed in yellow to i...	To tackle the Wordle challenge, we will implement a simple yet effective player that uses a strategy based on frequency analysis and deduction. We'll break down the implementation into three main components: the game logic, the player, and the evaluator. ### Step 1: Game Logic First, we need to create a function that...	12,699	[ { "from": "human", "value": "Wordle is a daily online word game that has received considerable attention recently.\nThe Game\nThe object is to guess a secret word in the fewest attempts. Consider the following instance of the game:\n\nThe secret word is rebus, and the player's first guess was arise. The let...
Write a program that erases itself. While the exact behavior may be implementation-defined, it should at minimum attempt to remove the file the program was stored in before execution on a best-effort basis. This is a popularity-contest, so the answer with the most upvotes will win.	Creating a self-erasing program can be interesting from a technical perspective, but it's essential to approach it responsibly. In this case, I'll provide a self-deleting Python program as an example. Please be aware that self-deleting scripts can be dangerous if misused or run unintentionally, so exercise caution. He...	1,421	[ { "from": "human", "value": "Write a program that erases itself. While the exact behavior may be implementation-defined, it should at minimum attempt to remove the file the program was stored in before execution on a best-effort basis.\n\nThis is a popularity-contest, so the answer with the most upvotes wil...
Create the shortest function, program, or expression that calculates a sequence of squarefree palindromic numbers. A squarefree number is one which is not evenly divisible by a square number (i.e. does not contain a repeated prime factor). For example, \$44 = 2^2 \times 11\$ is not squarefree, whereas \$66 = 2\times3\t...	To calculate a sequence of squarefree palindromic numbers, we can write a compact Python function that generates these numbers. Here's a concise implementation: ```python def is_squarefree(n): from math import isqrt for i in range(2, isqrt(n)+1): if n % (i*i) == 0: return False return T...	23,911	[ { "from": "human", "value": "Create the shortest function, program, or expression that calculates a sequence of squarefree palindromic numbers.\nA squarefree number is one which is not evenly divisible by a square number (i.e. does not contain a repeated prime factor). For example, \\$44 = 2^2 \\times 11\\$...
We define \$R_n\$ as the list of remainders of the Euclidean division of \$n\$ by \$2\$, \$3\$, \$5\$ and \$7\$. Given an integer \$n\ge0\$, you have to figure out if there exists an integer \$0<k<210\$ such that \$R_{n+k}\$ is a permutation of \$R_n\$. Examples The criterion is met for \$n=8\$, because: we have \$R_8...	To solve the problem of determining whether there exists an integer \( 0 < k < 210 \) such that \( R_{n+k} \) is a permutation of \( R_n \), we can approach it by analyzing the remainders of \( n \) under different divisors. ### Understanding the Remainders The function \( R_n \) produces a tuple of remainders when \(...	22,463	[ { "from": "human", "value": "We define \\$R_n\\$ as the list of remainders of the Euclidean division of \\$n\\$ by \\$2\\$, \\$3\\$, \\$5\\$ and \\$7\\$.\nGiven an integer \\$n\\ge0\\$, you have to figure out if there exists an integer \\$0<k<210\\$ such that \\$R_{n+k}\\$ is a permutation of \\$R_n\\$.\nEx...
Given an integer N > 1, output all other numbers which prime decompositions have the same digits as the prime decomposition of N. For example, if N = 117, then the output must be [279, 939, 993, 3313, 3331], because 117 = 3 × 3 × 13 therefore, the available digits are 1, 3, 3 and 3 and we have 279 = 3 × 3 × 31 939 =...	Here is a Python code solution that finds the prime decomposition of a given integer \( N \) and generates all other numbers that can be formed using the same digits of the prime factors. ```python from itertools import permutations from sympy import isprime, primefactors def prime_buddies(N): # Get prime factors...	18,139	[ { "from": "human", "value": "Given an integer N > 1, output all other numbers which prime decompositions have the same digits as the prime decomposition of N.\nFor example, if N = 117, then the output must be [279, 939, 993, 3313, 3331], because\n117 = 3 × 3 × 13\n\ntherefore, the available digits are 1, 3,...
For a story I'm writing, I needed to convert 101⅐ (101 + 1/7 if that doesn’t show up for you) into base 47. Expressing an integer in some base brings back memories of first learning how to program back in the days of 8-bit systems; it’s a fairly easy exercise. Doing so using a floating-point format is a bit harder, tho...	Your task of converting the rational number 101⅐ (which is 101 + 1/7) into base 47 representation while following the specified formatting rules is indeed intriguing. Let's break down the solution step-by-step to ensure that the output is correct. 1. Calculate the Value: - The first step is to convert the ratio...	7,062	[ { "from": "human", "value": "For a story I'm writing, I needed to convert 101⅐ (101 + 1/7 if that doesn’t show up for you) into base 47.\nExpressing an integer in some base brings back memories of first learning how to program back in the days of 8-bit systems; it’s a fairly easy exercise. Doing so using a ...
We've got quite a few national flag challenges already: AU CH FI FR GB GB IS KR NP US... Here's another, somewhat more advanced one: Return or print the decorative pattern from Belarus's national flag as a matrix of two distinct values for red and white. If your language doesn't support matrices, use a list of lists o...	Here's a solution in Python that creates the decorative pattern from Belarus's national flag as a matrix of two distinct values, using '1' for red and '0' for white. ```python pattern = [ "....###....#....###....", "#..#####...#...#####..#.", "..###.###.....###.###..", ".###...###...###...###.", "#...	43,443	[ { "from": "human", "value": "We've got quite a few national flag challenges already:\nAU\nCH\nFI\nFR\nGB\nGB\nIS\nKR\nNP\nUS...\nHere's another, somewhat more advanced one:\nReturn or print the decorative pattern from Belarus's national flag as a matrix of two distinct values for red and white.\n\nIf your l...
Write a program that generates a sequence of numbers starting with zero and then 100 random integers between -9 and 9. That sequence will be displayed like a roller coaster. Any increasing number in the sequence will go up and any decreasing number will go down Sample sequence: 0 1 8 5 -1 -5 7 1 3 3 4 6 9 -2 ... Sampl...	Here's a Python solution for generating the desired output in a concise manner: ```python import random s=[0]+[random.randint(-9,9)for _ in'_'100];p=0;M=max(s) for i in s:print(" "(p4)+""(max(0,(M-i+1)4))+""int(i4));p+=1 if i>s[p-1]else-1 ``` ### Explanation 1. Imports*: The `random` module is imported to...	16,172	[ { "from": "human", "value": "Write a program that generates a sequence of numbers starting with zero and then 100 random integers between -9 and 9.\nThat sequence will be displayed like a roller coaster.\nAny increasing number in the sequence will go up and any decreasing number will go down\nSample sequenc...
This is a challenge about the the tricks and optimizations that can be used when golfing in CJam. CJam golfers may recognize many of the tricks involved. However, unfamiliar approaches and constructs may be involved, so take a look at the CJam tips as well as the CJam instruction reference if you get stuck. Solutions m...	Here's the optimized solution for the CJam golfing challenge: Problem 1: Add one to every element in a list. - Original: `{1+}%` (5 bytes) - Optimized: Same as original, so 5 bytes. Problem 2: Create a list of partial sums. - Original: `_,\aee{~\)<:+}%` (16 bytes) - Optimized: `_,\aee{+}^%` (13 bytes) **Pr...	19,748	[ { "from": "human", "value": "This is a challenge about the the tricks and optimizations that can be used when golfing in CJam. CJam golfers may recognize many of the tricks involved. However, unfamiliar approaches and constructs may be involved, so take a look at the CJam tips as well as the CJam instructio...
Introduction Consider the following example: CODE + GOLF —————— GREAT This is an equation where each letter represents a decimal digit and the words represent natural numbers (similar letters represent similar digits and different letters represent different digits). The task is to match each letter with its digit ...	Here is a Python solution to the problem, which attempts to minimize the character count while remaining functional and readable. The solution uses `itertools.permutations` to generate digit assignments for each unique letter in the input string and checks if any of these combinations satisfy the given equation. ```py...	2,026	[ { "from": "human", "value": "Introduction\nConsider the following example:\n CODE\n+ GOLF\n——————\n GREAT\n\nThis is an equation where each letter represents a decimal digit and the words represent natural numbers (similar letters represent similar digits and different letters represent different digits). ...
You are given integers N and M, 1 <= N,M <= 10^6 and indexes i and j. Your job is to find the integer at position [i][j]. The sequence looks like this (for N=M=5, i=1, j=3 the result is 23): 1 2 3 4 5 16 17 18 19 6 15 24 25 20 7 14 23 22 21 8 13 12 11 10 9 Shortest code wins. Good luck!	You can achieve this in Python with a concise code snippet. The idea is to find out which "layer" or "ring" the position (i, j) is in and compute the value based on the layer and the coordinates. Here’s a compact solution: ```python def spiral_value(N, M, i, j): layer = min(i - 1, j - 1, N - i, M - j) # Determine...	14,694	[ { "from": "human", "value": "You are given integers N and M, 1 <= N,M <= 10^6 and indexes i and j. Your job is to find the integer at position [i][j]. The sequence looks like this (for N=M=5, i=1, j=3 the result is 23):\n 1 2 3 4 5\n16 17 18 19 6\n15 24 25 20 7\n14 23 22 21 8\n13 12 11 10 9\n\nShort...
The original "Blue Eyes" puzzle is given here (and below). A group of people with assorted eye colors live on an island. They are all perfect logicians -- if a conclusion can be logically deduced, they will do it instantly. No one knows the color of their eyes. Every night at midnight, a ferry stops at the islan...	To solve the given problem and determine when all blue-eyed people will leave the island based on the number of blue-eyed individuals (`b`), the number of non-blue-eyed individuals (`r`), and the oracle's statements, we can formulate a program that processes these inputs and uses logical reasoning to derive the answer....	28,381	[ { "from": "human", "value": "The original \"Blue Eyes\" puzzle is given here (and below).\n\nA group of people with assorted eye colors live on an island. They are\n all perfect logicians -- if a conclusion can be logically deduced,\n they will do it instantly. No one knows the color of their eyes. Every\...
The winding number is the integer number of net counterclockwise revolutions an observer must have made to follow a given closed path. Note that any clockwise revolutions count negative towards the winding number. The path is allowed to self intersect. Some examples (shamelessly taken from Wikipedia) are given below: ...	Here's a concise Python solution to calculate the winding number for a given path defined by a series of 2D points. This code is designed for code golf, so it minimizes character count while effectively computing the winding number. ```python def winding_number(points): wn = 0 for i in range(len(points)): ...	28,245	[ { "from": "human", "value": "The winding number is the integer number of net counterclockwise revolutions an observer must have made to follow a given closed path. Note that any clockwise revolutions count negative towards the winding number. The path is allowed to self intersect.\nSome examples (shamelessl...
Challenge: Given an array of non-negative whole numbers numbers in the range of 0 to Infinity, Check whether all of them are primes or not. (You can take input as a string too if you want) Input: Input: An array of numbers Output: The array with every element replaced by one of these: -1 -----> If 0, 1 ...	# Python, 154 bytes ```python def f(a): def p(n): if n<2:return-1 for i in range(2,int(n**.5)+1): if n%i==0:return n//i return 1 return[a[i] and p(a[i])for i in range(len(a))] ``` This function takes an array `a` of non-negative integers and returns a new list where: - Each element `0` or `1` is replaced b...	43,159	[ { "from": "human", "value": "Challenge:\nGiven an array of non-negative whole numbers numbers in the range of 0 to Infinity, Check whether all of them are primes or not. (You can take input as a string too if you want)\nInput:\nInput: An array of numbers\nOutput: The array with every element replaced by one...
Your task, if you wish to accept it, is to write a program that outputs a non-zero number(can be integer or float). The tricky part is that if I reverse your source code, the output must be the original integer negated. Rules You must build a full program. That is, your output has to be printed to STDOUT. Both the num...	Here's a solution in Python that satisfies the requirements: ```python print(2) ``` When you reverse the source code to `2 tnirp`, it interprets the reversed code as `print(2)` which outputs `2`. However, the output of the original code is `2`, so when we negate it, we get `-2`. In summary: - Original code output: ...	44,437	[ { "from": "human", "value": "Your task, if you wish to accept it, is to write a program that outputs a non-zero number(can be integer or float). The tricky part is that if I reverse your source code, the output must be the original integer negated.\nRules\n\nYou must build a full program. That is, your outp...
Warm up: Regex, Paper, Scissors This is the challenge I originally wanted to post, before realising that some very short solution exist. Nevertheless, it can be an interesting problem to think about in preparation for the actual challenge below. Write three regexes R, P and S such that they match each other in a cyclic...	To tackle the challenge of creating five regexes R, P, S, L, and V that match each other in a cyclic fashion according to the rules of Rock, Paper, Scissors, Lizard, Spock (RPSLV), let's first summarize the desired match patterns based on the relationships between the different elements: 1. R matches L, S ...	31,552	[ { "from": "human", "value": "Warm up: Regex, Paper, Scissors\nThis is the challenge I originally wanted to post, before realising that some very short solution exist. Nevertheless, it can be an interesting problem to think about in preparation for the actual challenge below.\nWrite three regexes R, P and S ...
Given a word (or any sequence of letters) as input, you must interpolate between each letter such that each adjacent pair of letters in the result is also adjacent on a QWERTY keyboard, as if you typed the input by walking on a giant keyboard. For example, 'yes' might become 'ytres', 'cat' might become 'cxzawert'. Rule...	Here's a Python solution that meets the requirements for the described problem. This code interpolates between the letters of a given input word according to the adjacency rules of a QWERTY keyboard. ```python def qwalk(s): k = 'qwertyuiopasdfghjklzxcvbnm' adj = {c: [] for c in k} for i, c in enumerate(k):...	10,131	[ { "from": "human", "value": "Given a word (or any sequence of letters) as input, you must interpolate between each letter such that each adjacent pair of letters in the result is also adjacent on a QWERTY keyboard, as if you typed the input by walking on a giant keyboard. For example, 'yes' might become 'yt...
We don't have enough (semi-)easy challenges for beginners. More and more of the easy ones are already taken. So I tried to come up with something that might be achievable by beginners, but that isn't a duplicate. Input: A single string separated with your OS new-line (i.e. \r\n), or an array with multiple strings. Outp...	Here's a Python solution to the described problem, focusing on achieving the task in a concise manner. The program processes input strings, filters out unwanted characters, and organizes them as specified: ```python import sys from collections import defaultdict # Read input input_data = sys.stdin.read().strip().spli...	17,517	[ { "from": "human", "value": "We don't have enough (semi-)easy challenges for beginners. More and more of the easy ones are already taken. So I tried to come up with something that might be achievable by beginners, but that isn't a duplicate.\nInput:\nA single string separated with your OS new-line (i.e. \\r...
Your challenge is to take input like this (a Hello World program): ++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++. And output a prompt (which will be "> "): > The user can then enter anything at the prompt. Your simple debugger must have these commands: S - ...	Here's a simple Brainfuck debugger implemented in Python that adheres to the provided specifications. The code is designed to handle Brainfuck programs, stepping through the code, managing an array, and providing input/output prompts as described. ```python import sys class BFDebugger: def __init__(self, program)...	13,672	[ { "from": "human", "value": "Your challenge is to take input like this (a Hello World program):\n++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++.\n\nAnd output a prompt (which will be \"> \"):\n>\n\nThe user can then enter anything at the prompt. You...
Inspired by last week's APL lesson. Given an uppercase 2D seat map and a 1D list of customers, return the seat map and the customer list but modified as follows (to indicate occupied seats and seated customers): For each unique letter in the input passenger list, lowercase that many (or all, if there are not enough) of...	To solve the problem of modifying a 2D seat map and a 1D customer list based on the described rules, we can break down the solution into several key steps: 1. Count Passengers: Count the occurrences of each unique letter in the customer list. 2. Modify Seat Map: For each unique letter in the customer list, mod...	9,505	[ { "from": "human", "value": "Inspired by last week's APL lesson.\nGiven an uppercase 2D seat map and a 1D list of customers, return the seat map and the customer list but modified as follows (to indicate occupied seats and seated customers):\nFor each unique letter in the input passenger list, lowercase tha...
Prindeal (pronounced prin-dee-al) is a new esoteric programming language that only has four commands: print, increment, decrement, and alias. Despite its minimalism, complex mathematical operations can be done in Prindeal by cleverly combining the four commands. Your task in this code golf challenge is to write the sho...	Below is a Python implementation of the Prindeal interpreter that processes Prindeal code according to the specification provided. This implementation handles all commands, variable management, and the aliasing feature effectively. ```python import sys class PrindealInterpreter: def __init__(self): self.v...	27,165	[ { "from": "human", "value": "Prindeal (pronounced prin-dee-al) is a new esoteric programming language that only has four commands: print, increment, decrement, and alias. Despite its minimalism, complex mathematical operations can be done in Prindeal by cleverly combining the four commands.\nYour task in th...
The Baum-Sweet Sequence (A086747 with a Twist) Take in a positive integer n and print the integers from 1 to n for which the Baum-Sweet sequence returns true. The Baum-Sweet sequence should return falsy if the binary representation of the number contains an odd number of consecutive zeros anywhere in the number, and tr...	Here's a Python solution for the Baum-Sweet sequence challenge, implementing it in a concise manner: ```python n=int(input()) print([i for i in range(1,n+1)if not any(b.count('0')%2 for b in bin(i)[2:].split('1'))]) ``` ### Explanation: - We read the integer input `n`. - We generate a list of integers from `1` to `n`...	49,310	[ { "from": "human", "value": "The Baum-Sweet Sequence (A086747 with a Twist)\nTake in a positive integer n and print the integers from 1 to n for which the Baum-Sweet sequence returns true. The Baum-Sweet sequence should return falsy if the binary representation of the number contains an odd number of consec...
Imagine you are sitting at a park. Suddenly your car gets hijacked and being driven in different directions. Here are the directions, arrows show which direction goes towards where: South \| V East-> <-West ^ \| North After being driven, the car stops. Now you have to find out ho...	Here’s a concise Python solution that calculates the displacement and angle of the hijacked car from the initial position based on the given directions: ```python from math import atan2,degrees,sqrt def car_displacement(m): x=y=0 for d in m: if d[1]=='East': x+=d[0] elif d[1]=='West': x-=d[0]...	24,418	[ { "from": "human", "value": "Imagine you are sitting at a park. Suddenly your car gets hijacked and being driven in different directions. Here are the directions, arrows show which direction goes towards where:\n South\n \|\n V\nEast-> <-West\n ^\n \| \n North\n\nAfter being ...
Create a program, that outputs a hello world string ("Hello world", "Hello, World" etc.), and source code. Output is written to stdout or equivalent. Hello world string is embedded in the source code. For example, the output for might be (some source code here)hello world(some source code here) When the output is comp...	Here's a program that meets the requirements outlined in your prompt. The program is written in Python, and it produces valid outputs for the first two executions before producing an invalid output on the third execution. ### First Source Code ```python # This program outputs a hello world string embedded in comments...	4,115	[ { "from": "human", "value": "Create a program, that outputs a hello world string (\"Hello world\", \"Hello, World\" etc.), and source code. Output is written to stdout or equivalent. Hello world string is embedded in the source code.\nFor example, the output for might be\n(some source code here)hello world(...
Here is another simple one: The Challenge Given two points in an n-dimensional space, output the distance between them, also called the Euclidean distance. The coordinates will be rational numbers; the only limits are the restrictions of your language. Lowest dimension is 1, highest is whatever your language can handl...	Here's a Python solution to calculate the Euclidean distance between two points in an n-dimensional space, with the output formatted to at least 3 decimal places. This solution uses the `math` library for calculating the square root and takes input as two lists representing the points. ```python import math def euc...	38,381	[ { "from": "human", "value": "Here is another simple one:\nThe Challenge\nGiven two points in an n-dimensional space, output the distance between them, also called the Euclidean distance.\n\nThe coordinates will be rational numbers; the only limits are the restrictions of your language.\nLowest dimension is ...
Inspired by this question earlier today, I'd like to see interesting ways various programming languages can turn a numpad into probabilities. Commonly, tile-based games will allow you to use a numpad to move in any direction based on where your character currently is. When making an AI for these games, Math.random() * ...	Here's a concise Python implementation that generates movement probabilities based on the specified numpad position. This solution accepts the position and outputs the corresponding probabilities, either including or omitting position 5 based on your preference. ```python def move_probs(pos): p = [50, 40, 30, 20, ...	27,046	[ { "from": "human", "value": "Inspired by this question earlier today, I'd like to see interesting ways various programming languages can turn a numpad into probabilities. Commonly, tile-based games will allow you to use a numpad to move in any direction based on where your character currently is. When makin...
I often forget what I wanted to say when the teacher calls on me to speak. Can you make me a tool to solve this? Requirements: The program must loop as follows: First, take in input If the input is empty, print the last stored question. Otherwise, store the input as a question. Notes: The input will never be empt...	Here's a concise Python solution to your problem that meets the requirements: ```python q='' while 1: i=input()or q q=i print(q) ``` This code initializes an empty string `q` to store the last input. It continuously loops, taking input from the user. If the input is empty, it outputs the last stored question; othe...	18,392	[ { "from": "human", "value": "I often forget what I wanted to say when the teacher calls on me to speak. Can you make me a tool to solve this?\nRequirements:\n\nThe program must loop as follows:\n\n\nFirst, take in input\nIf the input is empty, print the last stored question.\nOtherwise, store the input as a...