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Rafael S.T. Vieira


Last seen: Today
3 145 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.

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Rafael S.T. Vieira's Badges

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  • Knowledgeable Level 2
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  • Card Games Master
  • Number Manipulation II Master
  • Strings III Master
  • Strings II Master
  • Sequences And Series III Master
  • R2016b Feature Challenge Master
  • Strings I Master
  • Number Manipulation I Master
  • Sequences And Series II Master
  • Sequences And Series I Master
  • Magic Numbers II Master
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Solved


Check Digit - 02
Given a list of ISBN's, check whether they're valid or not. Prev Prob - <https://www.mathworks.com/matlabcentral/cody/problem...

environ 3 heures ago

Solved


Orthogonal lines
Check whether two given lines are orthogonal or not. Two lines are orthogonal if they create a right angle at their intersect...

environ 4 heures ago

Solved


Pascal's triangle
<https://en.wikipedia.org/wiki/Pascal%27s_triangle> if the order is: x = 3; the output will be: output = [0 0 0 1 0 0 ...

environ 21 heures ago

Solved


Archimedes principle
According to Archimedes principle, the buoyancy force is equal to the weight of fluid displaced by the submerged portion of an o...

environ 21 heures ago

Solved


Get a Fibonacci number's index.
*N.B.* For the purpose of this exercise, the first Fibonacci number is 1, and the second is 2; that is, |fib(1) = 1| and |fib(2)...

1 jour ago

Solved


Calculate SNR in dB using original signal and quantized signal
origs: the original signal quants: the quantized signal *hint* : need to calculate the quantization error and plug into SN...

1 jour ago

Solved


Fast 1-D Convolution (valid shape)
Pursuant to the first problem in the <http://www.mathworks.com/matlabcentral/cody/?term=Fast+1-D+Convolution fast 1-D convolutio...

1 jour ago

Solved


Multivariate polynomials - emulate symbolic form
In <https://www.mathworks.com/matlabcentral/cody/problems/44262-multivariate-polynomials-overload-multiplication Problem 44262> ...

1 jour ago

Solved


Find the right number make the equation
Given positive integer number n, find the right positive integer number a, b , so that (1) sqrt(a + n * b) is a positive inte...

1 jour ago

Solved


Fangs of pseudo-vampire number
given a number, find all the fangs of that number. A pseudo-vampire number can have multiple of fangs. The output should be a...

1 jour ago

Solved


Pseudo-vampire number
refer to <https://en.wikipedia.org/wiki/Vampire_number> Given a number x, determine whether it is a pseudo-vampire number. ...

1 jour ago

Solved


generate nth pentatope number
https://en.wikipedia.org/wiki/Pentatope_number

2 jours ago

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check whether a number is a pentatope number
<https://oeis.org/A000332>

2 jours ago

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Be happy
check whether the given number is happy in b-base. * A happy number can be defined as a number which will yield 1 when it is ...

2 jours ago

Solved


Cantor counting
Find the nth cantor's rational number. the sequence is given below in the link. Sequence: 1/1,1/2,2/1,3/1,2/2,1/3,1/4... ... .....

2 jours ago

Solved


Pell numbers
Find the nth pell number <https://en.wikipedia.org/wiki/Pell_number>

2 jours ago

Solved


GJam 2013 Veterans: Baby Height Prediction
This Challenge is derived from <http://code.google.com/codejam/contest/2334486/dashboard#s=p1 GJam 2013 Veterans Baby Height>. O...

2 jours ago

Solved


GJam 2013 China Event: Happy Teams
This Challenge is derived from <http://code.google.com/codejam/contest/2933486/dashboard#s=p0 GJam 2013 China Bad Horse>. The pr...

2 jours ago

Solved


GJam 2013 China Event: Happy Teams 100 Pairs
This Challenge is derived from <http://code.google.com/codejam/contest/2933486/dashboard#s=p0 GJam 2013 China Bad Horse> partial...

2 jours ago

Solved


Mmm! Multi-dimensional Matrix Multiplication
You have got a couple of multi-dimensional matrices, A and B. And want to multiply them. For the first 2 dimensions, an ordinary...

2 jours ago

Solved


Accurate Division
Given three integers x, y and d, return x/y (as a string) to d significant digits. Remove leading and trailing zeros. Example...

2 jours ago

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Church Encoding
Church encoded numeral is a function which takes two arguments _f_ and _x_ and applies _f_ to _x_ several times. For example,...

2 jours ago

Solved


Number of even divisors of a given number
Given a Number n, return the number of its even divisors without listing them. example: n=14 ; EvenDivisors={2,14} ; y=2 ...

2 jours ago

Solved


Bell Triangle
Form the bell triangle upto nth bell number posotion; * if n=5 * y= [1 0 0 0 0; 1 2 0 0...

2 jours ago

Solved


Tell your secret
A secret can be told only to 2 persons in 5 minutes. Now, these 2 more persons can spread the secret to 4 other people in the ne...

2 jours ago

Solved


Castling-02
This is a follow up of problem <https://www.mathworks.com/matlabcentral/cody/groups/1/problems/45329-castling-01> Given...

2 jours ago

Solved


Castling-01
Given the position of only one player's chess pieces(some of them) on the chessboard, figure out whether castling is valid or no...

2 jours ago

Solved


Should Mr McNugget even get out of bed today?
As we learned in <http://www.mathworks.com/matlabcentral/cody/problems/42888-frobenius-mcnugget-factorization an earlier problem...

2 jours ago

Solved


Frobenius McNugget Factorization
Mr. Frobenius McNugget is a peculiar man. As you might expect, he likes to eat Chicken McNuggets. But his love of number the...

2 jours ago

Solved


Iccanobif numbers 1
There are a lot of problems in Cody that deal with Fibonacci numbers (1, 1, 2, 3, 5, 8, 13, 21 etc...) so let's turn things arou...

2 jours ago

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