Visible Buildings
Task
Given an array of building heights and an input integer k, find all the combinations of the height such that exactly k buildings are visible.
Any format for input and output is valid.
In case it is not possible to see exactly as many buildings, output anything that cann...
Let \$A\$ be a positive integer consisting of \$n\$ decimal digits \$d_1,d_2,...,d_n\$. Let \$B\$ be another positive integer.
For the purpose of this challenge, we call \$A\$ a copycat of \$B\$ if there exists at least one list of positive integers \$p_1,p_2,...,p_n\$ such that:
$$\sum_{i=1}^{...
Definite Integral of one continue function in a finite interval
It is given as input
1) one representation of one continue function f (example as one anonymous function
or as one string that the language translate in a function, or as one composition of functions)
2) one finite close interva...
Introduction
The EKG sequence begins with 1 and 2, then the rule is that the next term is the smallest positive integer not already in the sequence and whose common factor with the last term is greater than 1 (they are not coprimes).
The first terms are:
1, 2, 4, 6, 3, 9, 12, 8, 10, 5, 15, ...0
Lunar Arithmetic
Lunar Arithmetic (also called dismal arithmetic, a play on decimal) is an alternative to elemental arithmetic in which only addition and multiplication is defined, and then only for non-negative integers. For single-digit numbers, addition is defined as the maximum of the two di...
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Do you know Icy Tower ? Here is a gameplay example of what i'm talking about
The game concept is simple : you play as Harold the Homeboy, and your goal is to jump from floors to floors to go as high as possible without falling and getting off-screen ( the camera goes higher following you or at a...
Does this Set Represent a Natural Number? code-golf decision-problem set-theory
In set theory, the natural numbers \$\mathbb{N} = \{0, 1, 2, 3, ...\}\$ are usually encoded as pure sets in the following way:
Zero is the empty set: \$ Set(0) = \{\} \$
For a number \$n > 0\$: \$ Set(n) = Set(n-1)...
