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…
Tag: C#
C# – CodeForces – Okabe and Banana Trees
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…
C# – CodeForces – Okabe and Future Gadget Laboratory
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…
C# – CodeForces – Karen and Game
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…
C# – CodeForces – Karen and Coffee
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…
C# – CodeForces – Karen and Morning
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.…
C# – CodeForces – An express train to reveries
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…
C# – CodeForces – An abandoned sentiment from past
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…
Entity Framework – C# – CodeFirst – Video
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.…
Entity Framework – C# – Introduction – Video – Part 2
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…
Entity Framework – C# – Introduction – Video
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,…
CodeForces – Problem 798B – Mike and strings
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…
Codeforces – Problem 798A – Checking the Calendar
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…
VBA vs C++ function – which one is faster in Excel?
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…
C++ – Adding C++ function to VBA/Excel
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…
C# – EF – Beginning with Entity Framework
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…
C# – Code Forces – Codeforces Round #406B
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…
C# – Code Forces – Codeforces Round #402B
Codeforces.com is really a nice site, if want to try yourself vs. the top programming students in the world. Just to check your level in a way 🙂 Thus, today I have decided to take a look at the problems…
News – The owner of VitoshAcademy is a Microsoft Specialist – Programming in C#
Vitoshacademy is proud to announce that its owner, is now a Microsoft Specialist in Programming in C#, exam 70-483. So, after MTA and MCP, this is the new certificate in the collection. The exam was tough, indeed and this is…
C# – Serialization and Deserialization of JSON
Whatever they tell you C# is somehow a fancy language. One of the reasons for this is that you may use the hard work of plenty of other good developers for free and without even thinking of how to make…
C# – simple example of interfaces
After the previous article here for simple example of inheritance, today I have decided to write something similar for interfaces. Pretty much, interfaces are something similar that objects implement. 🙂 E.g., if you have keyboard and a phone, they both…
C# – Simple example of inheritance
Reading the C# 6.0. book for which I am preparing a review made me think that I do not post a lot of C# code. Thus, I have decided to prepare a simple C# example of inheritance with overriding. Let’s see…
C# – Greedy Algorithm from CodeForces
One may write a few chapters in an algorithmic book for greedy algorithms. The funny part about them, is that there are a set of algorithmic problems, where the greedy solution tends to be the best one. What exactly is…
C# – Algorithms – Find n-th divisor of an integer
The Codeforces contests are sometimes more challenging than expected, even for the first problems, which are supposed to be trivial. Well, they are not that trivial. In the 762. edition, the 1. problem was concerning the n-th divisor of an…
C# – LINQ – Remove duplicates from a list and ignore values from another list
My idea for the blog was to post some articles every now and then. But at least, I am trying to keep up to a schedule of minimum 1 article per week, to keep it alive. Thus, I have decided…
C# – Loop through Excel files and get data from them
C# and .Net were actually thought as the technology that was going to exchange VBA and make it useless. Well, it did not happen because of many reasons, mainly because plenty of companies still use macros and noone has the…
C# – LINQ – Example for LINQ initialization
Lately I am interested in C# again and thus I have taken a deeper look at LINQ (Language Integrated Query). My previous article, concerning it was here. I thought it was interesting, that the value in LINQ is calculated after…
C# – Loop through enum names in .Net
Ok, C# and .Net have features that people from the VBA world can only … dream about. In a way. I was recently taking a look at the Type.GetEnumNames() function in .Net and I simply thought that it would be…
C# – Some simple example for threads
The idea here is to show a little bit about parallel programming and the way I understand it – as far as I am mainly a VBA developer, I do not understand it, because Microsoft did not think that it…
Code Forces – New Year and North Pole – A problem much easier than initially thought
In the new 2017 I have decided to take a new look at CodeForces and what do they bring us. After all, this is one of the very few “places” in the world, where you can compete with the world…
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