Count the divisors of a number in Java
The challenge
Count the number of divisors of a positive integer n.
Random tests go up to n = 500000.
Examples
numberOfDivisors(4) == 3 // 1, 2, 4 …Technical Articles
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My smallest code interpreter in Java
The challenge
Inspired from real-world Brainf**k, we want to create an interpreter of that language which will support the following instructions: …
Read Article →Pick peaks in Java
The challenge
Write a function that returns the positions and the values of the “peaks” (or local maxima) of a numeric array.
For example, …
Read Article →Number of trailing zeros of N in Java
The challenge
Write a program that will calculate the number of trailing zeros in a factorial of a given number.
N! = 1 * 2 * 3 * ... * N
Be careful …
Read Article →Alphabetic Anagrams in Java
The challenge
Consider a “word” as any sequence of capital letters A-Z (not limited to just “dictionary words”). For any word …
Read Article →Remove file from Git without deleting locally
If you find yourself in a position where you have already committed some files to git, and they are in the remote repository already, but you want to …
Read Article →Recover a secret string from random triplets in Java
The challenge
There is a secret string which is unknown to you. Given a collection of random triplets from the string, recover the original string.
A …
Read Article →Range Extraction in Java
The challenge
A format for expressing an ordered list of integers is to use a comma separated list of either
- individual integers
- or a range of …
Reversed Words in Java
The challenge
Complete the solution so that it reverses all of the words within the string passed in.
Example:
ReverseWords.reverseWords("The …CamelCase Method in Java
The challenge
Write a simple CamelCase method for strings.
All words must have their first letter capitalized without spaces.
Example:
// …Even or Odd in Java
The challenge
Create a function that takes an integer as an argument and returns “Even” for even numbers or “Odd” for odd …
Read Article →Square Every Digit in Java
The challenge
You need to square every digit of a number and concatenate them.
For example, if we run 9119 through the function, 811181 will come out, …
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