A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 x 99. Find the largest palindrome made from the product of two 3-digit numbers. Permalink: http://projecteuler.net/problem=4 Palindrome is very interesting thing. It’s a se...

The prime factors of 13195 are 5, 7, 13 and 29. What is the largest prime factor of the number 600851475143? Permalink: http://projecteuler.net/problem=3 If you familiar with prime numbers, you apparently know basic algorithms to find them, if not, I advice to get familiar with it. There are lot of ...

Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, … By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-value...

This article provides step-by-step instruction how to configure Clojure environment. Little history Long time I was using swank-clojure as connector to my Clojure projects from Emacs SLIME. But, suddenly, I lost all my emacs preferences and needed to configure it again (yeah, it’s my fault, this tim...

If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23. Find the sum of all the multiples of 3 or 5 below 1000. Permalink: http://projecteuler.net/problem=1 The simplest problem and nothing hard to solve it in standard iterati...

Finally decided to post here my solutions to Project Euler implemented in Clojure. As all in my life, frequency of posts with solutions will be mood-dependent. The main reason for this series to provide a little introduction to clojure programming language during the solving interesting problems. I’...

Recently, I found on reddit very interesting Java code snippet (slightly modified): HashSet set = new HashSet(); set.add(new URL("http://google.com")); set.contains(new URL("http://google.com")); Thread.sleep(60000); set.contains(new URL("http://google.com")); What do you think the output for lines ...

This is my first post. It is always hard to begin something, but I’ll try. Why? I had blog earlier on LiveJournal, it was basically in Ukrainian, my native language. But more time I was working on something, less time I had to write something. Honestly, it even was not programming specific blog, jus...