Prefix Sum Algorithm

UPDATE – This post has been updated.

A lot of good things are happening in my work life. I will continue to comment in future posts.

Today I discussed an idea regarding a new service which will extract data from a huge set of files and will be able to allow access to users. Sorry I will not be able to comment much more on this. I have committed to have a first pass of the architecture and high level design documents first thing Monday morning. Continue reading “Prefix Sum Algorithm”

The Bomberman Game

Today is not a nice day in the Twin Cities of Minneapolis and St. Paul. It rained all night long and will continue to do so until late evening. Currently the temperature at 44 F and will continue to drop a few degrees. It is a perfect day to make and bake pizza.

After breakfast I made the dough from scratch. It is important to have quality high gluten flower and yeast. The dough is now sitting in a bowl in the kitchen covered with a towel letting it rise.  Apparently we are missing red onions and green peppers. My wife and I will stop by Hy-Vee around noon to get the missing ingredients. We are making thick pepperoni pizzas. Continue reading “The Bomberman Game”

Absolute Permutation

UPDATE:  The technical issue that prevented me from posting a solution was promptly resolved by HackerRank. I received a message indicating all was well to proceed.

It is Sunday and a sunny day in the Twin Cities of Minneapolis and St. Paul. I tried solving the Absolute Permutation challenge from Hacker Rank but ran into an issue. Will comment on it and show my solution which at this time has not been accepted.

Today is Mothers Day. If you are a mom hope you enjoy the day with your family. My wife and I have two sons. One lives in Indiana, and the other in Minnesota. The one in Minnesota stopped by yesterday afternoon with flowers and his two kids. Earlier this morning our son and wife called to wish my wife a nice day. Continue reading “Absolute Permutation”

Flatland Space Stations

Please do not be shocked by the introductory sentences. I was born into an Italian family. My parents moved from Italy to Peru in the 1930’s. Growing up in Peru we were introduced to have wine with weekend meals. In particular wine was only served for lunch. My sisters and I started drinking lemonade with wine. After a few years we moved to have a desert that is made of fresh strawberries with sugar and wine. You just mix the ingredients and let them sit for a couple hours in the fridge. If you try it this summer, make sure it is served chilled. As we got older we had weekend lunch with a couple bottles of wine. None of us ever had issues with alcohol. Different cultures have different approaches to solve the same issue. We just need to make sure that what we do works to solve the problem. If it does not, learn and put practice different approaches. This philosophy can and should be applied to life and software development. Continue reading “Flatland Space Stations”

Family Names

Yesterday my wife had an appointment at the hair salon. The gal that cut her hair commented that there were more people than usual complaining of seasonal allergies; some of them have never before experienced symptoms. My wife and I have some light allergies every season. Some days this year we have experienced strong symptoms. Hopefully things will get better soon.

Last evening in the local news, it was mentioned that due to the amount of water due to rain and melted snow, farmers are a couple weeks behind planting their crops. Having grains and vegetables is more important than experiencing allergy symptoms. Hopefully all will turn out well as the season progresses. The forecast for today calls for strong rain starting around mid morning and ending early tomorrow. Most of the rivers in this area are at or above normal flood levels. Hope the forecast falls short in moisture.

This week I had the opportunity to talk with a fellow software developer. We briefly discussed the approach of traversing a data structure using loops and recursion. It seems that if the number of objects is relatively small, recursion is elegant approach. That said, for large number of objects, recursion may fail due to execution stack limitations. Continue reading “Family Names”

Beautiful Triplets

It seems that today is going to be another nice day in the Twin Cities of Minneapolis and St. Paul. For some reason I woke up a few minutes shorter than 04:00 AM. I decided to give a try to the HackerRank challenge that I received via email.

If interested take a look at the requirements on how to determine what makes a triplet beautiful. Continue reading “Beautiful Triplets”

Calculate Pi

It is a beautiful day in the Twin Cities of Minneapolis and St. Paul. Currently it is sunny and the forecast call for highs in the lower 60s. My wife and I are planning on walking 5 miles after work.

The topic for this post is computing Pi. Unless you are working on some specific mathematical issue that requires an extreme precision, you would not attempt to generate Pi or care about how it is generated.  You would use the value (typically a constant) returned by the mathematical library in your favorite programming language. Continue reading “Calculate Pi”

Yard Design

This morning I received in my Gmail account the following edited message:

“Hello Mr. Canessa,

I have a long fixed rectangle in my front yard and I would like to design a Fibonacci garden within this rectangle.

The width of the rectangle is 16.5 feet. The length is 48.5 feet.

I am thinking I could fit two Fibonacci designs within this but I don’t know where to start with my measurements.

How do I go from a 16.5 x 16.5 big square to the smaller squares and rectangles?

Any help will be appreciated.

I do sort of understand but would like some help so that it looks right.

Thank you!

Regina”

The message was also left in this post. Continue reading “Yard Design”

ACM ICPC Team

It is Thursday April 11 and this area of the Twin Cities of Minneapolis and St. Paul has received since yesterday around noon to today around 04:00 PM about 10 inches of snow. Around noon today the snow stopped and we start receiving freezing rain. Schools are closed and there is very little traffic in the area.

According to the forecast, tomorrow will be raining during the day. Not sure if the precipitation will turn into freezing rain. One way or the other, staying home working is not a bad idea. Continue reading “ACM ICPC Team”

Equalize the Array

It seems like it is going to be a nice day in the Twin Cities of Minneapolis and St. Paul. The sun is shining and the forecast calls for a high in the mid 60s. If it remains dry my wife and I will go for a walk around 05:00 PM. Looking forward to a walk to burn some calories gained over the weekend. Continue reading “Equalize the Array”