LY Cao

Last seen: 7 månader ago | Active since 2011

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9 Problems
2106 Solutions

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Ternary Conditional Operator
Returns one of two expressions depending on a condition. (test) : (expression1) : (expression2) *test:* Any Boolean ex...

nästan 5 år ago

Solved

Test your luck!
This problem is designed to test your luck, and therefore the contents of your function are irrelevant. In order to do so, the t...

mer än 7 år ago

Solved

Just take it easy for a second or two!
Your code needs to take 'exactly' one second or 'exactly' two seconds to run (depending on the input) — accurate to ±0.5 millise...

mer än 7 år ago

Solved

Wait a second!
Your code needs to take 'exactly' one second to run — accurate to ±0.5 milliseconds. The input will be the number of millis...

mer än 7 år ago

Solved

Tautology
Check if the given expression is always true. For example, the sentence '~(A & B) == (~A | ~B)' is always true. Chara...

mer än 7 år ago

Solved

Shorten pathname
Given a pathname string, return a condensed version by replacing intermediate folders with '..'. *Example* If fullpat...

mer än 7 år ago

Solved

Big data
Optimize this line of code: B = sum(gradient(corrcoef(A)).^2); for a matrix A with size(A,2)>>size(A,1) *Description:...

mer än 7 år ago

Solved

One track five lanes
Find the minimum number of lane changes necessary to cross the entire track without running into any obstacles <<http://www.a...

mer än 7 år ago

Solved

Five steps to enlightenment
This problem asks you to identify valid variations of the famous <https://en.wikipedia.org/wiki/Sum_and_Product_Puzzle sum and p...

mer än 7 år ago

Solved

The sliding puzzle: 3D
This is an extension of <https://www.mathworks.com/matlabcentral/cody/problems/42842 problem 42842>. In this case, the puzzle is...

mer än 7 år ago

Solved

Five-dimensional maze
*Description* The traditional maze is 2-dimensional: the navigator can move in the positive or negative directions along two ...

mer än 7 år ago

Solved

Pandigital Multiples of 11 (based on Project Euler 491)
A "Pandigital number of order X" is one that contains all of the numbers from 0 to X, but with no leading zeroes. If X>9, the c...

mer än 7 år ago

Solved

Inscribed Pentagon? 2
Your function will be provided with the five vertices of a pentagon (p) as well as the center point (cp) and radius (r) of a cir...

mer än 7 år ago

Solved

Ned's Queens
A tribute to Cody's five-year anniversary should also celebrate the people behind Cody, and in this particular case, our illustr...

mer än 7 år ago

Solved

Recaman Sequence - III
I want to create a Recaman sequence where the nth number will be 1. So from which integer should I start the Recaman sequence? ...

mer än 7 år ago

Solved

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

mer än 7 år ago

Solved

Hexagonal numbers on a spiral matrix
Put hexagonal numbers in a ( m x m ) spiral matrix and return the sum of its diagonal elements. Formula of hexagonal numbers ...

mer än 7 år ago

Solved

Birthday cake
It's Cody's 5th birthday, and you've been tasked with putting the candles on the cake. Your goal is to maximize the distance bet...

mer än 7 år ago

Solved

Cache me Outside
The test suite includes a simple recursive Fibonacci sequence generator, but it's terribly inefficient. One simple method for im...

mer än 7 år ago

Solved

Is this a valid Tic Tac Toe State?
For the game of <https://en.wikipedia.org/wiki/Tic-tac-toe Tic Tac Toe> we will be storing the state of the game in a matrix M. ...

mer än 7 år ago

Solved

Pair Primes
Let's define pair primes as follow; * *For 2 digits numbers:* 11 and 17 are pair primes because both of them are 2 digits pri...

mer än 7 år ago

Solved

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

mer än 7 år ago

Solved

"Cody" * 5 == "CodyCodyCodyCodyCody"
*Alice*: What? *"Cody" * 5 == "CodyCodyCodyCodyCody"*? You've gotta be kidding me! *Bob*: No, I am serious! Python supports...

mer än 7 år ago

Solved

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...

mer än 7 år ago

Solved

An asteroid and a spacecraft
&#128640 Imagine a non-relativistic simple situation. Assume positions p0, p1, p2, and p3 are three dimensional Cartesian ...

mer än 7 år ago

Solved

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 ...

mer än 7 år ago

Solved

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...

mer än 7 år ago

Solved

Pi Digit Probability
Assume that the next digit of pi constant is determined by the historical digit distribution. What is the probability of next di...

mer än 7 år ago

Solved

Parse me a Lisp
*Description* In Lisp and its variants, function calls are done using parenthesis where the first item in the parenthesis is ...

mer än 7 år ago

Solved

Acid and water
⚖ ⚖ ⚖ ⚖ ⚖ ⚖ ⚖ ⚖ Assume that there is a 100 liter tank. It is initially fi...

mer än 7 år ago