For questions regarding counting the number of occurrences of some characteristic.

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14
votes
13answers
1k views

Display a tally (in varying bases)

Tallying is a simple counting system that works in base 5. There are various different tallying systems used around the world, but the one that is used in most English-speaking countries is perhaps ...
13
votes
2answers
526 views

How many characters per character?

At http://shakespeare.mit.edu/ you can find the full text of each of Shakespeare's plays on one page (e.g. Hamlet). Write a script that takes in the url of a play from stdin, such as ...
19
votes
17answers
2k views

How many IP addresses are in a given range?

Inspired by... http://programmers.stackexchange.com/questions/241402/how-can-i-work-out-how-many-ip-addresses-there-are-in-a-given-range Write a program or function that takes two strings as input, ...
35
votes
24answers
7k views

Fast, Cheap, and Good - Choose any Two

As programmers, we all know the saying: "You can have it fast and good, but it won't be cheap, you can have it cheap and good, but it won't be fast, or you can have it fast and cheap, but it won't be ...
49
votes
34answers
10k views

Avoid the evil integers!

You are developing some code to generate ID numbers. Policy requires that no ID numbers include the digit sequence 666. Create a function (or your language's equivalent) which takes a positive ...
-1
votes
11answers
544 views

Count the unique fractions with only integers

Count the number of unique fractions with numerators and denominators from 1 to 100, and print the counted number. Example: 2/3 = 4/6 = ... Rules: You must actually count in some way. Only integers ...
11
votes
38answers
2k views

Count occurrences of an integer

Based on the question How many positive integers < 1,000,000 contain the digit 2?. I'm looking for the most creative solution to count all the Integers from X to Y containing the Integer Z. Z can ...
12
votes
33answers
2k views

Display number of occurrences for every character in an input string

The code should take a string as input from keyboard: The definition of insanity is quoting the same phrase again and again and not expect despair. The output should be like this(not sorted in any ...
0
votes
8answers
465 views

Create a programs that counts the 0's in numbers from 0 to a billion [duplicate]

This will be my very first post on stackexchange so bear with me. Create a program that counts from 0 to 1,000,000,000. Now the trick is to not print all these characters but to only print how many ...
-4
votes
6answers
299 views

Return the number of digits in any given number [closed]

Objective Given any terminating, rational number, return the number of digits the number contains. Do not count zeros if they're the last digits. Examples 0 returns 1 -1 returns 1 6.23 returns 3 ...
6
votes
6answers
621 views

Count the number of cyclic words in an input

Cyclic Words Problem Statement We can think of a cyclic word as a word written in a circle. To represent a cyclic word, we choose an arbitrary starting position and read the characters in ...
6
votes
4answers
508 views

Convert from binary to unary in 7x7 Manufactoria

In the game manufactoria, take in a binary number and output that number of red pieces. The catch? The board-size is only 7x7: Here's the manufactoria code for the problem: ...
5
votes
8answers
510 views

Square-free semiprime counting

Definition A square-free semiprime is a natural number that is the product of two distinct prime numbers. The task Given a natural number n, count all square-free semiprimes less than or equal ...