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Rafael S.T. Vieira


Last seen: Today
1,526 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
  • 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
  • Indexing III Master
  • Indexing II Master
  • Indexing I Master

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Pandigital Factors (Based on Euler 491)
A Pandigital Number is a number containing all of the digits from 0-9 inclusive, with the added stipulation that it does not hav...

11 hours ago

Solved


It's going down. We're finding simbers!
This problem is inspired by Project Euler 520: Simbers. "We define a simber to be a positive integer in which any odd digit, ...

12 hours ago

Solved


Odd elimination
Inspired by Project Euler problem #539 You'll be given a vector from 1 to n; Going from left to right, remove the first n...

12 hours ago

Solved


Golomb's self-describing sequence (based on Euler 341)
The Golomb's self-describing sequence {G(n)} is the only nondecreasing sequence of natural numbers such that n appears exactly G...

12 hours ago

Solved


Pseudo Square Root (Inspired by Project Euler 266)
Shamelessly copied from the Project Euler page for Problem 266: ------------- The divisors of 12 are: 1,2,3,4,6 and 12. T...

12 hours ago

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Narcissistic problem
How many likes has this problem?

13 hours ago

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Count decimal digits of a number
* Given an integer number you have to return the number of its digits. * For example 248 has 3 digits and 1589 has 4 digits ...

13 hours ago

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Product of elements in row
Product of matrix such that a=[3 3 1] b=9

13 hours ago

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Flip the bit
Given an input character string (e.g. '1001'), return a character string with the bits flipped ('0110').

13 hours ago

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Count number of words in string
Count number of words in string Examples 'hi', answer is 1 'hi hi', answer is 2 'I enjoy cody', answer is 3

13 hours ago

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Determine if input is divisible by three.
Given a positive integer, n, determine if n is divisible by 3. If yes, the function should output true. If no, false.

13 hours ago

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Minefield Sonar
*Background* In mine-hunting games (e.g. Microsoft Minesweeper), the user is provided with a covered grid that, upon a left c...

13 hours ago

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The Tower of Hanoi
In the <http://en.wikipedia.org/wiki/Tower_of_Hanoi Tower of Hanoi problem> with 3 rods (1, 2 & 3), the goal is to move a tower ...

13 hours ago

Solved


Read a Soroban Abacus
*Description* The Soroban is the name of the modern Japanese abacus. Information on reading a Soroban can be found <http://we...

13 hours ago

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Parasitic numbers
Test whether the first input x is an n-parasitic number: <http://en.wikipedia.org/wiki/Parasitic_number>. ( _n_ is the second in...

14 hours ago

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Find the sequence
Find the nth number of a sequence. Check the test suite to determine the sequence. * hint: it is closely related to familiar ...

14 hours ago

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Abelian Sandpile - 01
Generate a matrix like abelian sandpile where the center of the matrix is n. For example, n=3 out=[0 0 0 0 ...

14 hours ago

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Tribonacci Sequence
Generate the tribonacci sequence upto n

14 hours ago

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$10,000 sequence
Find the nth term of the Hofstadter–Conway sequence and its chaotic cousin. <https://en.wikipedia.org/wiki/Hofstadter_sequenc...

14 hours ago

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remove numbers from a string
check the given string for any numbers.in case one is found,remove it.but the two portions should be separated. if more than one...

15 hours ago

Solved


Reverse Calculator
Use this reverse calculator and give correct output Its simple, In my Reverse calculator if you press 0 it will be considered...

16 hours ago

Solved


N-Cards Problem
You have a deck of _N_ cards numbered in order from 1 to _N_. You discard the top card (card 1) and place the next card (card 2)...

16 hours ago

Solved


Guess Cipher
Guess the formula to transform strings as follows: 'Hello World!' --> 'Ifmmp Xpsme!' 'Can I help you?' --> 'Dbo J ifm...

16 hours ago

Solved


Getting the absolute index from a matrix
This is a basic MATLAB operation. It is for instructional purposes. --- You may already know how to get the <http://www.ma...

16 hours ago

Solved


Let's see how peculiar we can get
The task is to multiply two numbers. But do it in the most peculiar possible way.

18 hours ago

Solved


Bell Number calculator
Calculate a vector of Bell numbers for sets up to length n. Bell numbers are the maximum number of partitions of a set. See the ...

18 hours ago

Solved


Gauss Eliminate 2-by-2 example
Use forward elimination to make the coefficient matrix, A, an upper triangular matrix, and then solve using back substitution, f...

18 hours ago

Solved


Construct a string from letters and counts
Given two input arrays like this: [5,3,1] ['a','b','c'] Output a string that contains each letter the specified num...

19 hours ago

Solved


Happy 2013...
Happy 2013, everyone! An interesting tidbit about 2013 is that it is the first year since 1987 to contain four different digits...

19 hours ago

Solved


Ordinal numbers
Given an integer n, return the corresponding ordinal number as a character string. For example, ord(1)='1st' ord(2)=...

19 hours ago

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