Task
Haskell's and Scala's standard libraries have an unfold function that builds a list from an initial state s and a function f. This is done with the following steps (explained in an imperative way to be simpler):
Apply f to s.
If the result
is empty, we're done building the list!
Otherwise,...
Background
A338268 is a sequence related to a challenge by Peter Kagey. It defines a two-parameter function \$T(n,k)\$, which counts the number of integer sequences \$b_1, \cdots, b_t\$ where \$b_1 + \cdots + b_t = n\$ and \$\sqrt{b_1 + \sqrt{b_2 + \cdots + \sqrt{b_t}}} = k\$. Since \$k\$ cannot ...
Calculate the square root of a matrix
Let \$A\$ be a square matrix that is at least \$2 \times 2\$ where each element is an integer. \$A^2 = A \times A\$ will then have the same dimensions as \$A\$, and will have integer elements. For example, let
$$A = \left[ \begin{matrix}
-3 & 2 \\
0 & -1
\e...
I am solving a puzzle at codingame.com and I have to write a code that has at most 200 characters, now it has 772 counting tabs. Is it possible to do something with an input scanner so it takes less characters? The condition alone makes like 180 and don't worry about how a code looks like it's ju...
Introduction
Factorials are one of the most frequently used examples to show how a programming language works.
A factorial, denoted \$n!\$, is \$1⋅2⋅3⋅…⋅(n-2)⋅(n-1)⋅n\$.
There is also the superfactorial (there are other definitions of this, but I chose this one because it looks more like the fact...
I have 2 input : 1 single number and some number seperate by whitespace :
1
1 2 3 4 5
I want to loop over the second input, i don't need the first input. I did this :
input();for x in input().split():somecode()
But can I go directly to the second input without doing the input() at the beginning...
