Lorenzo

Last seen: Today | Active since 2026

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Research and Development Engineer

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Encoding Google Maps Polylines
This problem is based on the Google Polyline Encoder algorithm. This is how Google Maps encodes a line for display on a map. You...

10 hours ago

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Sokoban: Puzzle 10.45
The <http://www.game-sokoban.com/index.php?mode=level&lid=16138 Sokoban Site> has many puzzles to solve. This Challenge is to s...

10 hours ago

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Recycled Numbers (CodeJam Qualification Round 2012)
Let's say a pair of distinct positive integers ( _n_ , _m_ ) is recycled if you can obtain _m_ by moving some digits from the ...

10 hours ago

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Mastermind V: Optimal Solver - average number of guesses
The following description contains a copy of Richard Zapor's <https://www.mathworks.com/matlabcentral/cody/problems/44239-master...

10 hours ago

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Group-wise Euclidean distance
*Input*: * *x* —— An array of size *n-by-d*, where each row vector denotes a point in a d-dimensional space; * *g* —— A gro...

10 hours ago

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Test for balanced parentheses
Given the input inStr, give the boolean output out indicating whether all the parentheses are balanced. Examples: * If ...

10 hours ago

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Digit concentration in Champernowne's constant
Consider the first 50 digits of Champernowne's constant 0.12345678910111213141516171819202122232425262728293... The...

10 hours ago

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En passant - 01
This is white's turn. The player moves his pawn. The pawn's previous and current positions are given. Determine whether th...

11 hours ago

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Find the Next Legal Move in Reversi
<http://en.wikipedia.org/wiki/Reversi Reversi>, also known as Othello, is a game in which reversible white/black chips are place...

11 hours ago

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ZigZag - 04
Given a matrix, print all its elements in the spiral form (clockwise direction). For example, a=[16 2 3 13 ...

11 hours ago

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Rotate Matrix Both Direction (45 Degree)
*Matrix (3x3 only) rotation*: 3 inputs: *x* matrix, *n* times and *m* option. output: *y* matrix with *n x 45* degree ...

11 hours ago

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Convert vector of strings to lower triangular matrix
Given a non-empty vector vec of strings, please put its elements into the lower triangular half of a square matrix M column-wise...

11 hours ago

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Mean number of letters per word (Hard)
The previous problem in this series is <https://www.mathworks.com/matlabcentral/cody/problems/44852-mean-number-of-letters-per-w...

11 hours ago

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Magic Matrix
We are all familiar with the concept of magic matrix. In a magic matrix, the summation of all rows, columns and both diagonals...

11 hours ago

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Word Search Solver
There are n words (minimum of three letters in each word) supplied with a given word search board. The answer will contain n row...

11 hours ago

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Ugly numbers - 02
Ugly numbers are those whose prime factors are 2, 3 or 5. find the nth ugly number. n.b. unlike the previous problem,trivi...

11 hours ago

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Ugly numbers - 01
Ugly numbers are those whose prime factors are 2, 3 or 5. find the nth ugly number.

11 hours ago

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Circumscribed Pentagon?
Building off of <https://www.mathworks.com/matlabcentral/cody/problems/44368 Problem 44368>, your function will be provided with...

11 hours ago

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Is it a mail?
Electronic mail, or email, is a method of exchanging digital messages between people using digital devices such as computers, mo...

11 hours ago

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5th Time's a Charm
Write a function that will return the input value. However, your function must fail the first four times, only functioning prope...

11 hours ago

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Digital Neighbourhood
Given a natural number reorder its digits to create another number, closest to the given one. Examples: * 123 gives 132, ...

11 hours ago

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Sums of Distinct Powers
You will be given three numbers: base, nstart, and nend. Write a MATLAB script that will compute the sum of a sequence of both ...

11 hours ago

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The Yellowstone Permutation
The Yellowstone Permutation is a sequence of positive integers, defined by the following rules: No term is repeated. Given n t...

12 hours ago

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Get ranking of a combination
I have the numbers pulled without replacement from the set [1 2 3 4 5 6 7 8 9 10 11 12 13]; They are then ordered from least to ...

12 hours ago

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Lowest sum from a group of digits
Hi there. It's James's daughter here again, and my third grade math teacher is up to her old tricks. This time, she's giving u...

12 hours ago

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Determine the full width at half max
Determine the full width at half max of a curve. The full width at half maximum (FWHM) is a parameter which is used for desc...

12 hours ago

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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...

12 hours ago

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Easy Sequences 104: One-line Code Challenge - GCDs of Sum of Consecutive Cubes
For a natural number, n, the function CC(n) is defined as follows: In other words, CC(n) is the sum of cubes ...

12 hours ago

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Easy Sequences 105: One-line Code Challenge - IPv4 Address Validation
The Internet Protocol version 4 (IPv4) is the dominant protocol for routing devices over the internet. IPv4 addresses are usuall...

12 hours ago

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Undocumented MATLAB tricks No. 1 - Save a function-returned struct
Often we face the case when we want to save a function-returned struct to a mat file with each of its field as individual variab...

12 hours ago