Your challenge is to determine whether the given input is an integer, a string, or a decimal.
Rules
A string is any input that is not an integer or a float
An integer must contain only numeric characters and must not start with a zero
A decimal is any input that contains the period (.) and the...
How do we score code written in TI-BASIC, when it comes to multi-character words? For example:
:If X>2:Then:Stop
Seemingly, the above should count as 17 characters. However, TI-BASIC treats the Then as a single character when it comes to selecting and deleting characters, unlike most programmi...
What's a half on the clock?
In my room, I have this geeky clock (click for full size):
Most of these are not difficult to figure out, but the one for 4-o-clock is particularly tricky:
Normally, a fraction like 1/2 doesn't make sense in modular arithmetic since only integers are involved. T...
A fountain is arrangement of coins in rows so that each coin touches two coins in the row below it, or is in the bottom row. Here's a 21 coin fountain:
Your challenge is to count how many different fountains can be made with a given number of coins.
You will be given as input a positive int...
Elements with Z > 100
(Sandbox note: Is there a better name for the title?)
The International Union of Pure and Applied Chemistry (IUPAC) decided that it is necessary to have a systematic naming for the elements with atomic number greater than 100 (Z > 100), even for those which had not been ...
This is the cops' thread. The robbers' thread goes here.
Write a program or function consisting only of printable ASCII characters that outputs at least 5 printable ASCII characters in ascending order (from space to tilde / 32 to 126). Characters can be outputted several times, as long as they a...
Matlab, 27 characters
____________3_3___4_3______
Output: (ans = \n\n is not part of the output, the output is just the last line)
ans =
"""""""""""""""""""""""""""""""""""""""""""########$$$$$$%%%%&&&&'''(()))**++,,-../001223456789:;<=>?@BCDFGHJKMNPRTUWY[]_acehjloq
Marbelous, 39 characters
_ is an unknown character: it may or may not be a newline.
* represents a newline character.
__^__________*__<___________@___/_*____
Output:
%,:>?@@BBFFNN^^~~
Online interpreter. None of the options should be checked.
Introduction
Number theory is full of wonders, in the form of unexpected connections. Here's one of them.
Two integers are co-prime if they have no factors in common other than 1. Given a number N, consider all integers from 1 to N. Draw two such integers at random (all integers have the same p...
Is a scoring system based on the binary representation of the code ok? What should I look out for especially regarding loopholes?
I plan to release a puzzle based on counting occurences of patterns in the binary representation of the source code, as if you would take the code and put it in an A...
Parse a new markup language
Editor's note: that's my first challenge, don't judge strictly.
I've created a new markup language. Here are the basic rules:
To make text bold, surround it with {*} in the beginning and [*] in the end. So, {*}text[*] results in text.
To make text italic, surround ...
How does one catch Ctrl+C in C?
Inspired from this question, I decided to submit an interweaved program (now deleted) written in Seed. This program uses a Mersenne twister to generate programs by entering a program that consists of two numbers. Using these two numbers, Seed generates a Befunge program. This is created by the ra...
