Unpopular patterns that show up often in coding interviews if you have not read part1, you should start with it 4- Multisource BFS This pattern is used when you need to traverse all points at a similar depth level at once and process them according to the problem statement or find the shortest…

Unpopular patterns that show up often in coding interviews I assume you are already comfortable with common algorithms and data structure. if you have not taken this course, you should start with it. Examples are from Leetcode and solutions are in python 1- Traversing 2D space. This pattern solves problems where you are given…

Why would you want to get better with DP? I have been struggling with DP forever. I just could not get it, so I just start to memorize common DP patterns for technical interviews because it’s not even that common, it shows up only 10% of the time. One day I was having a mock interview and a DP problem…

Dealing with google sheets is an essential skill not everyone is comfortable with. At Ebtsama, we are all volunteer-based students, so asking volunteers to learn such skill was not really practical although we needed to keep track of distributed tasks and mentor its progress. …

. Introduction : If you have taken math for CS class or tried to understand some cryptography algorithm you probably have been just told that a≡b mod m means that a-b is devisable by m (so have I) but I couldn’t understand why is that useful or what the heck is going…

we’ve all been through these long boring lines of waiting to check-in for a conference or any event with a large number of audience, We at Ebtsama faced that problem and we tried to solve it as cheap as possible since we’re a charity and we came up with one…