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Rafael S.T. Vieira


Last seen: Today
1.815 total contributions since 2020

I'm a post-doctoral researcher of Computer Science at the Federal University of Ceará. And I hold a Ph.D. in Computer Science with an emphasis in Computer Graphics at the Federal University of Ceará (2017), Brazil.

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Rafael S.T. Vieira's Badges

  • Thankful Level 1
  • Knowledgeable Level 2
  • First Answer
  • Magic Numbers II Master
  • Magic Numbers Master
  • Divisible by x Master
  • Project Euler I
  • Tiles Challenge Master
  • Matrix Patterns III Master
  • Matrix Patterns II Master
  • Matrix Patterns I Master
  • Draw Letters
  • Cody Problems in Japanese Master
  • Indexing V Master
  • Indexing IV Master

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Solved


MiniMax
Find the smallest value in array, which is the maximum of its row and column. Example: in array shown below are two numbers w...

circa 15 ore ago

Solved


"Find out the best cricket"
This is how I originally read Problem 2013, so let's just go with it. Give me the first and last name of the best cricket, rega...

circa 15 ore ago

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P-smooth numbers
This Challenge is to find <https://en.wikipedia.org/wiki/Smooth_number P-smooth number> partial sets given P and a max series va...

circa 15 ore ago

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Fermat's Last Theorem - Fermat's conjecture
Fermat's Last Theorem (sometimes called Fermat's conjecture, especially in older texts) states that no three positive integers a...

circa 16 ore ago

Solved


Champernowne Constant
The <http://en.wikipedia.org/wiki/Champernowne_constant Champernowne constant> is a real number whose digits in decimal represen...

circa 16 ore ago

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When can one be the Life Member of the IEEE?
Consult the site http://en.wikipedia.org/wiki/Ieee from where it can be seen that IEEE Members who have reached the age of 65 an...

circa 19 ore ago

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Solving a quadratic equation
Given a, b ​​and c, Return the solution of the following quadratic equation: a*x^2 + b*x + c = 0.

circa 19 ore ago

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Volume of Cylinder
Compute the Circumference of a Cylinder given it's radius and height.Here x is the radius and y is the height

circa 19 ore ago

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Calculate the logarithm of number
Calculate the logarithm of number x

circa 19 ore ago

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calculate the tangent of angle in radians
Calculate the tangent of angle in degrees

circa 19 ore ago

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Determine if a row vector has NaN
Determine if a row vector x has NaN

circa 19 ore ago

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Test if a number is numeric or not
Test if a number is numeric or not

circa 19 ore ago

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Ohm's Law
Well its Ohm's law... So V = IR! I will give two of the three values, such as V and I or I and R and you have to return th...

circa 19 ore ago

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Power of n ?
Determine if _x_ (positive integer) is a power of _n_, return true or false accordingly.

circa 19 ore ago

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fly fly away
A fly moves following a predefined sequence of discrete jumps (defined by the vectors _dx_ and _dy_) repeating the same sequence...

circa 19 ore ago

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Simple return on investment
Assume you have some money and want to invest all your money to stock market. You randomly select a stock and invest all your mo...

circa 20 ore ago

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create a circulant matrix
create a circulant matrix

circa 20 ore ago

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Find the square of the sum of the digits of a number
If a number (n) is provided as an input, find the square of the sum of the digits of the number. Example If n = 21, the an...

circa 20 ore ago

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Create an array (n,n) where only diagonal elements are '1' and others are '0'
Create an array (n,n) where only diagonal elements are '1' and others are '0' EX: n = 3; then Resultant array would be [ 1 0...

circa 20 ore ago

Solved


Next Lower Power of B
Given a number _n_ and a base _B_ greater than 1, return the lowest integer power of _B_ that is less than or equal to _n_. E...

circa 20 ore ago

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count to vector
Return a matrix of numbers of dimension K by N, where K = prod(v), and N=length(v). The rows count from a vector of ones up to v...

circa 20 ore ago

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Accessing elements on the diagonal
Access the diagonal elements of a matrix without 'diag' function

circa 20 ore ago

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Create a square matrix of zeros of even order
Create a square matrix of zeros of even order

circa 20 ore ago

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Find maximum value of a curve
Two vectors shall be already defined: - Input vector x (e.g. x = 0:1:10) - Result vector y (e.g. y = sin(x)) Create a n...

circa 20 ore ago

Solved


Area of square
Find the area of a square whose diagonal length is given as x.

circa 20 ore ago

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Small Riddle
Mr. Smith has two children. If the older child is a boy, what are the odds that the other child is also a boy?

circa 20 ore ago

Solved


Leap Year
According to Gregorian Calender(which is in use now, in many countries),decide whether a given year is a leap year or not. Give...

circa 20 ore ago

Solved


Alternately upper-lower case
Modify the string to alternate between upper and lower case. For example, s='achyuta' output='AcHyUtA'

circa 20 ore ago

Solved


Rotate a matrix for 180 degree
Rotate a matrix for 180 degree for eg: x=[1 2 3 4] y=[4 3 2 1]

circa 20 ore ago

Solved


Find out the Gray Code for a Given Binary Number
Find out <http://en.wikipedia.org/wiki/Gray_code Gray Code> for a given binary number Example Binary input 1000 Gray ...

circa 20 ore ago

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