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William


3,297 total contributions since 2012

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William's Badges

  • Cody5 Hard Master
  • Introduction to MATLAB Master
  • Combinatorics I Master
  • Computational Geometry III Master
  • Word Puzzles Master
  • Strings I Master
  • Card Games Master
  • Project Euler I
  • Divisible by x Master
  • Computational Geometry IV Master
  • Indexing V Master
  • Computational Geometry II Master
  • Draw Letters
  • Matrix Manipulation I Master
  • Magic Numbers II Master

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Solved


Calculating large fibonacci numbers
The fibonacci sequence starts 1,1,2,3,5,8... Find the the n'th fibonacci number. Then calculate round(log10( . )) of that n't...

1 day ago

Solved


TEST1A
TEST1A

3 days ago

Solved


Generate Golomb's sequence
Generate Golomb's sequence upto the given number. if n=4, then seq=1, 2, 2, 3, 3, 4, 4, 4. if n=6, then seq=1, 2, 2, 3, 3, 4, 4,...

3 days ago

Solved


Circumcircle Points
Determine the radius of the minimum sized circle that encompasses all the points. Per <http://www.inf.ethz.ch/personal/gaertn...

3 days ago

Solved


Remove duplicated triangles
Input T is a triangulation (triplet list of indices -positive integers-, each index refering to a vertex number in a correspondi...

4 days ago

Solved


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

4 days ago

Solved


Count the Number of Undirected Cycles in a Graph
Given a symmetric adjacency matrix, determine the number of unique *undirected* cycles. For example, the graph represented by...

4 days ago

Solved


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Add two numbers for beginners only

6 days ago

Solved


magic solver
Create a function that returns _true_ and has a cody <http://www.mathworks.com/matlabcentral/cody/problems/256-return-the-size-o...

8 days ago

Solved


Become the leader
The goal of this problem is the same as the goal of the rest of them: *become the leader*. Actually, you can only solve this ...

8 days ago

Solved


generate the matrix
given a value n (say 4) - generate the matrix like below; y= [0 1 2 3 4; -1 0 1 2 3; ...

8 days ago

Solved


cofactor matrix
given a matrix, find its cofactor matrix https://en.wikipedia.org/wiki/Minor_(linear_algebra)#Inverse_of_a_matrix

8 days ago

Solved


Find triangles from edge
First input is T, a Triplet list of indices -whom each row actually contains the three indices of a triangle vertices-. size(T) ...

11 days ago

Solved


wythoff sequence
find the lower wythoff sequence upto n; https://oeis.org/A000201

11 days ago

Solved


Adjoint matrix
given a matrix a, find the adjoint matrix of a.

11 days ago

Solved


find nth even fibonacci number
1st even fibonacci number=2 ; 2nd even fibonacci number=8 ..

11 days ago

Solved


Find edges from a vertex
First input is T, a triplet list of indices. Second input is i, a single index (positive integer). The goal of this function is ...

12 days ago

Solved


Find a common edge
First input is T, a triplet list of indices. Second input is e = [e1 e2], a row vetcor, couple of indices (positive distinct int...

14 days ago

Solved


Find a common vertex
First input is T, a triplet list of indices. Second input is i, a single index (positive integer). The goal of this function is ...

14 days ago

Solved


Cross ("+") flag returns
Given two odd numbers, [m, n], return a matrix of size m x n which has all elements of the centre column and centre row set as 1...

14 days ago

Solved


Capture the flag(s)
Flags are distributed randomly on a large board. Starting from the corner position your goal is to capture as many flags as poss...

14 days ago

Solved


Rotate a matrix without using rot90
rotate the input square matrix by certain degrees (e.g. 270 or 450 etc.) without using rot90 or flip function. its an extension...

16 days ago

Solved


AES MixColumns() Transformation
Given a 16x2 input character hexadecimal array representing the AES state, execute the AES algorithm MixColumns() transformation...

18 days ago

Solved


Number of paths on a n-dimensional grid
This problem is inspired by <https://www.mathworks.com/matlabcentral/cody/problems/1483-number-of-paths-on-a-grid> and <https:/...

19 days ago

Solved


Fun with permutations
There are factorial(N) permutations of the numbers from 1 to N. For each of these permutations, we can find the set of indexes j...

22 days ago

Solved


Determine whether a given point is inside or outside a polygon
A closed polygon may be described by an N x 2 array of nodes, where the last node and the first node are the same. Each row of ...

22 days ago

Solved


AES-256 KeyExpansion()
Given a 32-byte hexadecimal character array representing the AES-256 input key, execute the AES-256 algorithm, KeyExpansion() an...

23 days ago

Solved


AES SubBytes() Transformation
Given a 16x2 input character hexadecimal array representing the AES state, execute the AES algorithm SubBytes() transformation a...

23 days ago

Solved


Calculate days until Christmas
Provided with inputs year, month, day e.g. 2019,11,12, calculate the number of days until the next Christmas day, i.e. the next ...

24 days ago

Solved


another bullseye
create matrix like below -- for x=2, y=[1 1 1 1 1; 1 2 2 2 1; 1 2 3 2...

24 days ago

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