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Rafael S.T. Vieira


Last seen: 1 day ago Active since 2020

Computer Scientist in love with Computer Graphics.

Programming Languages:
Python, C, Java, PHP, Javascript, MATLAB, SQL, HTML, CSS, Arduino, Shell
Spoken Languages:
English, French, Portuguese

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  • MATLAB Central Treasure Hunt Finisher
  • Thankful Level 2
  • Thankful Level 1
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  • R2016b Feature Challenge Master
  • Word Puzzles Master
  • Card Games Master
  • Number Manipulation II Master
  • Strings III Master
  • Strings II Master
  • Sequences And Series III Master
  • Strings I Master

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Solved


Compute the nth Pythagorean prime
Pythagorean primes have the form p = 4n+1, where n is an integer, and they can be written as the sum of squares of two integers....

1 day ago

Solved


Word Ladder
Given a set of words, and two other words - start and destination, Find the smallest chain from start to the destination such...

3 days ago

Solved


Kolakoski Sequence
This is a modified version of the kolakoski sequence. Refer to the problem <https://www.mathworks.com/matlabcentral/cody/p...

3 days ago

Solved


Quarantine Days
In these quarantine days, a list of what Max may do on a typical day is given in a table with the starting hour to ending hour. ...

3 days ago

Solved


Sub-sequence - 03
Given three sequences, find the length of the longest common subsequence. It is similar to the previous problem -- <https...

4 days ago

Solved


Sub-sequence - 02
Given two sequences, find the length of the longest common subsequence. a=[1,1,1,1,1,2,3,1,4] b=[2,3,0,0,9,5,4,1] longe...

4 days ago

Solved


Sub-sequence - 01
Find the length of the longest increasing subsequence in the given array. a=[2,4,2,1,3,5,6] longest increasing subsequen...

4 days ago

Solved


The Tortoise and the Hare - 02
Previous problem <https://www.mathworks.com/matlabcentral/cody/problems/45425-the-tortoise-and-the-hare-01> Suppose in an inf...

4 days ago

Solved


volume of a rectangle prism
volume of a rectangle prism using "b" as base, "h" as height and "w" as width.

4 days ago

Solved


area of a rectangle
area of a rectangle base b and height h

4 days ago

Solved


area of a rectangle
area of a rectangle with base "b" and height "h"

4 days ago

Solved


area of a circle
area of a circle with "r" as radius

4 days ago

Solved


Coin Distribution - 02
Prev prob <https://www.mathworks.com/matlabcentral/cody/problems/45385-coin-distribution> Given a set of coins and an amount,...

4 days ago

Solved


Count the ways to draw non-intersecting chords between points on a circle
There are 9 ways to draw non-intersecting chords between four points on the perimeter of a circle (including no chords at all). ...

4 days ago

Solved


Identify Ruth-Aaron numbers
After Hank Aaron hit his 715th home run and passed Babe Ruth’s total of 714, Carl Pomerance noticed that the union of the prime ...

4 days ago

Solved


List modest numbers up to n
After determining the nude numbers, or the numbers that openly display some of their divisors as their digits, one would think t...

5 days ago

Solved


Find numbers in the Popular Computing Z-sequence
Here’s a quick one. In 1977 the magazine Popular Computing sought “problem situations for which the computer is the best (if not...

5 days ago

Solved


Determine whether a number is a fibodiv number
The number 14 is a fibodiv number because you can divide it into 1 and 4, use those numbers as the seeds for a Fibonacci sequenc...

5 days ago

Solved


Fill a rectangle with 1x1 and 2x2 tiles
A 3x2 rectangle can be filled with 1x1 and 2x2 tiles in three ways: The colors merely distinguish the sizes of the tiles. A 3...

5 days ago

Solved


Classify product/digit-sum sequences
Cody Problem 53120 involved a sequence in which a term is computed by multiplying the previous two terms and adding the digits o...

6 days ago

Solved


Compute the Sequence of the Day
A sequence starts with 1 and 2, and each subsequent term is the sum of the digits of the product of the previous two terms. As a...

6 days ago

Solved


List the dopey numbers
If vile numbers have binary representations that end with an even number of zeros (even vile), then numbers with binary represe...

6 days ago

Solved


List the vile numbers
Evil numbers, the subject of Cody Problem 2733 have an even number of ones in their binary representations, whereas odious numbe...

6 days ago

Solved


Sum the elements in rows of the Levine triangle
The Levine triangle starts as follows: Row 0: 2 Row 1: 1 1 Row 2: 1 2 Row 3: 1 1 2 To construct each row, r...

6 days ago

Solved


Find the smallest integer m such that n divides m!
Write a function that takes an integer and finds the smallest integer whose factorial is divisible by . For example, if , then...

7 days ago

Solved


Find the nth nude number
The number 672 is a nude number because it openly displays three of its divisors: 6, 7, and 2. In other words, a nude number is ...

7 days ago

Solved


Acid and water
&#9878; &#9878; &#9878; &#9878; &#9878; &#9878; &#9878; &#9878; Assume that there is a 100 liter tank. It is initially fi...

7 days ago

Solved


Easy Sequences 24: Number of Coprime Lattice Points
Given a number 'n', you were tasked to mark and count all coprime lattice points at the first quadrant bounded by the points (0,...

7 days ago

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