Using Visual Studio and Excel is actually quite fun – the Visual Studio advanced environment provides a bit more possibilities than the Visual Basic Editor, built-in Excel. In this article, about a year ago I have shown how to loop…

Solving problems at CodeForces is a kind of hobby. Lately, in round 449, division 2, there was a problem which has met my interest. It has to do with palindromes and really big numbers. The problem is easy to calculate,…

Time has passed since my last review in VitoshAcademy and thus I have requested a new great book from Apress.com for a review. Although I am not a C++ developer (and I have never been paid to develop on anything…

In order to learn a language, the best way is to practise it! Thus, I have decided to challange myself to solve a task on CodeForces with VBScript. As far as VBScript is not one of the official CodeForces languages…

Every time, wherever I decide to take a look at CodeForces and to code & publish some of the easy problems, I am thinking that this is probably the last one, because it is too easy. However, I always find…

Another SoftUni algorithm problem that I have considered interesting is presented here: You are given an integer S. Generate all non-empty sequences of numbers in range [1…S], which have sum of elements ≤ S. Display the sequences in their natural order,…

Y = mX+B This formula is the basics of the Cartesian coordinate system. And about 70% of the knowledge, needed to solve problem B in the 2. Division of CodeForces. The problem looks like this: There are n points on a coordinate…

The first problem in CodeForces, division 2 is usually an implementation problem. This means that after reading it, a Joe-average algorithmic person would know how to write it in less than 5 minutes. Or so I thought, before seeing this…

Magic tickets are considered the tickets in which the sum of the left digits is equal to the sum of the right digits. E.g., if you ticket is number 124016 it is a magic ticket, because 1+2+4 = 0 +…

CodeForces.com has become something like a hobby – instead of thinking about a topic for an article, I simply solve a problem there and blog about it. Thus, lately I have taken a look at Round 428, Division 2, problem…

CodeForces.com is one of the reasons why I blog quite often. Last week, in round 427 there was an interesting problem, which I was eager to solve. The problem was described as follows: The Cartesian coordinate system is set in…

CodeForces.com is the web site, which shows problems for competitive programmers. Today I have decided to take a look at the 2. problem of the 2. division of Round 424 –Keyboard Layouts. The problem is pretty simple to explain for…

Codeforces has easy and tough questions. However, the easy are not always easy, but the tough are always tough. Thus, after writing the Excel article here for Sumproduct, I have decided to go a bit easy and start with the…

CodeForces has people working 24/7, trying to come up with interesting problems for the IT community. Thus, it’s always challenging to take a look at these problems and to try to solve them. The latest problem I have faced was one…

It does not happen a lot, but this time the 2. problem of CodeForces really made me rethink my life choices and made me feel a bit sorry that I was in a school where we studied Maths about 4 hours…

CodeForces is a nice website for anyone, who likes checking himself vs the top developers worldwide. It’s even separated into divisions, thus, they kindly provide 3 easy questions and 5 hard. Although, I do not know anyone who can call…

Karen and Game is the third article about Karen. In a row. Pretty much, someone in CodeForces has created 7 different problems with her, thus the Japanese lady is getting famous. This time the problem looks like this: The game is…

If you are following this blog you are probably asking yourself Who the beep is Karen? and why do I write a 2. article about her in a row? 🙂 Well, that’s Karen and she obviously likes coffee: Karen was the main…

Its Sunday and it is time for CodeForces. Today I have taken a look at round number 816, Problem A. The problem initially looks rather easy and you think that nothing can go wrong, until you do not try it.…

CodeForces.com is a web site for competitive programming. One of the 2 really famous sites in internet. Yesterday I was fighting with a the problem 2 in Division B from competition number 814 for about 1 hour, until I have managed…

CodeFoces.com is the place where I go when I do not know what to blog about. 🙂 Anyhow, as a developer who is with some experience there, I always expect that the first problems of Division 2 would be quite…

After the first two videos for C# Entity Framework (Video 1 and Video 2) I have decided to make a small one for the Code First approach. I have used the materials of SoftUni here, mainly concentrating on problem 3.…

After the first part of the SoftUni homework for Entity Framework here, I have decided to make a small video with the next 4 problems. Following the same logic, I have made a 30 minute YouTube video with the trial…

I have started some time ago to do stuff with Entity Framework (EF) in VitoshAcademy, I even have two articles about it – Beginning with EF and Enable Migrations with EF. I have noticed that the SoftUni is having an EF course,…

Solving problems in CodeForces usually never works out as expected somehow – if I tend to overestimate the problem, I am able to solve it within 10 minutes and if I underestimate it, I stay about 1 hour on a simple…

After reviewing the Meller watch, it’s time for some more IT related stuff in the blog. Thus, I have decided to do what I usually do when I want to write some article and I do not know what to…

Comparing the speed of VBA and C++ in general is quite not fair. Its like comparing the speed of a military jet and a Boeing 767. But still, it’s interesting to see how much C++ is faster in Excel’s native…

After adding a c# library to VBA I have decided to take a look how to do a similar trick with C++. C++ is a bit fancier in a way. And it works somehow else. So, let’s start. Imagine that we…

What is Entity Framework? If we take a look at Wikipedia, it says Entity Framework (EF) is an open source object-relational mapping (ORM) framework for ADO.NET. What does it mean? Pretty much, magic. 🙂 You make some classes in C# and…

Its Sunday and it is a good idea to see what CodeForces have done through the week. As in general, lots of good problems. Thus, starting with the easiest one in the second division. A. The Monster A monster is…