Jelly, 8 bytes
²R²+²Æ²O
This answer is non-competing, since it uses features that have been implemented after the challenge was posted. Try it online!
This approach does not use floating point math, so it will give the correct answer as long as the intervening lists can fit into memory.
Idea...
Pyth - 13 bytes
Brute forces all possible ones up till n^2+1.
f!%.a,TQ1S*QQ
Test Suite.
Jelly, 4 bytes
Ḥc÷‘
Try it online!
How it works
Ḥc÷‘ Left argument: z
Ḥ Compute 2z.
c Hook; apply combinations to 2z and z.
÷‘ Divide the result by z+1.
Pyth, 8
/.cyQQhQ
Try it online or run the Test Suite
Explanation
/.cyQQhQ ## implicit: Q = eval(input())
/ hQ ## integer division by (Q + 1)
.c ## nCr
yQ ## use Q * 2 as n
Q ## use Q as r
Jelly, 3 bytes
\o@
This answer is non-competing, since it uses features that have been implemented after the challenge was posted. Try it online!
How it works
\ Do a cumulative reduce, using the link to the right.
@ Reverse the argument order of the link to the left.
o Take th...
Pyth, 8 bytes
t.u|YNQ0
Uses .u (cumulative reduce) by | (Python's or), with base case 0.
Jelly, 2 bytes
rS
Try it online.
Takes two numbers as command-line arguments. This is non-competing since Jelly was created after this challenge.
Pyth, 6 4 bytes + 3 = 7 5 bytes
s}vzQ
Avoids the 3-byte penalty imposed by the new input requirements via an extra byte.
Takes input separated from stdin separated by newlines.
Live demo.
https://en.wikipedia.org/wiki/Connect_Four
Does anyone remember the 2 player game connect 4? For those who don't it was a 6x7 board that stands vertical on a surface. The goal of connect 4 is to, well connect 4! The connection is counted if it is horizontal, diagonal, or vertical. You place your...
Product over a range
Your task is simple: given two integers a and b, output ∏[a,b); that is, the product of the range between a inclusive and b exclusive. You may take a and b in any reasonable format, whether that be arguments to a function, a list input, STDIN, et cetera. You may output in an...
Product over a range
Your task is simple: given two integers a and b, output ∏[a,b); that is, the product of the range between a inclusive and b exclusive. You may take a and b in any reasonable format, whether that be arguments to a function, a list input, STDIN, et cetera. You may output in an...
First question here, don't yell at me if this is a duplicate or a bad challenge.
Introduction
I thought of this challenge myself, and it seems to be a good basic puzzle for beginner code-golfers. It also might help me decide which code-golfing language to learn.
Challenge
Given an array of in...
TL;DR: The Problem
This keeps happening in chat:
Surprise at flags on vulgar messages. Language that would invariably get your comments deleted on the main site occasionally gets flagged and deleted in chat. Confusion reigns.
Controversial topics leading to bickering and name-calling. Folks b...
Product over a range
Your task is simple: given two integers a and b, output ∏[a,b); that is, the product of the range between a inclusive and b exclusive. You may take a and b in any reasonable format, whether that be arguments to a function, a list input, STDIN, et cetera. You may output in an...
Before anyone says anything, similar and similar. But this is not a dupe.
Some positive integers can be written as the sum of at least two consecutive positive integers. For example, 9=2+3+4=4+5. Write a function that takes a positive integer as its input and prints as its output the longest s...
Write a function that takes as its input a string and prints a truthy value if the string is a pangram and a falsey value otherwise.
Case of letters should be ignored; If the string is abcdefghijklmnopqrstuvwXYZ, then the function should still return a truthy value. Note that the string can cont...
Product over a range
Your task is simple: given two integers a and b, output ∏[a,b]; that is, the product of the range between a and b. You may take a and b in any reasonable format, whether that be arguments to a function, a list input, STDIN, et cetera. You may output in any reasonable format,...
Your task is simple: given two integers a and b, output ∏[a,b]; that is, the product of the range between a and b. You may take a and b in any reasonable format, whether that be arguments to a function, a list input, STDIN, et cetera. You may output in any reasonable format, such as a return valu...
