Community Profile

# 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.

#### Rafael S.T. Vieira's Badges

View all

Contributions in
View by

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

Solved

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

Solved

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

Solved

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

Solved

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

Solved

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

Solved

Calculate the logarithm of number
Calculate the logarithm of number x

circa 19 ore ago

Solved

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

circa 19 ore ago

Solved

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

circa 19 ore ago

Solved

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

circa 19 ore ago

Solved

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

Solved

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

circa 19 ore ago

Solved

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

Solved

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

Solved

create a circulant matrix
create a circulant matrix

circa 20 ore ago

Solved

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

Solved

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

Solved

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

Solved

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

circa 20 ore ago

Solved

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

circa 20 ore ago

Solved

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

Solved

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