# Jang-Hong Choi

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**Content Feed**

Solved

Circle/Pentagon Overlap

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...

16 days ago

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Inscribed Pentagon?

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...

16 days ago

Solved

Is this is a Tic Tac Toe X Win?

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. ...

16 days ago

Solved

Pentagonal Numbers

Your function will receive a lower and upper bound. It should return all pentagonal numbers within that inclusive range in ascen...

16 days ago

Solved

I Plead the Fifth

Write a function to provide a yes or no answer to the input string. However, it must plead the 5th amendment (return an empty st...

16 days ago

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The Top 5 Primes

This problem series invites you to solve two simple problems related to the integer NUMBER FIVE, in order to celebrate <https://...

16 days ago

Solved

(Linear) Recurrence Equations - Generalised Fibonacci-like sequences

This problem is inspired by problems <http://uk.mathworks.com/matlabcentral/cody/problems/2187-generalized-fibonacci 2187>, <htt...

16 days ago

Solved

Generalized Fibonacci

The Fibonacci sequence is defined as: Fib(1) = 0 Fib(2) = 1 Fib(N) = Fib(N-1) + Fib(N-2) The Fibonacci sequence ca...

17 days ago

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Minimum Distance between two N-sided Polygons

This Challenge is to determine the minimum distance between two non-overlapping polygons. The input is a cell array of two vecto...

17 days ago

Solved

Triangular Tiling Dots in a Circle

Return how many <http://en.wikipedia.org/wiki/Triangular_tiling Triangular Tiling> grid points there are inside a circle of radi...

18 days ago

Solved

Number of lattice points within a circle

Find the number of points (x,y) in square lattice with x^2 + y^2 =< n. This is related to Jame's <http://www.mathworks.com/matla...

18 days ago

Solved

Crossing to Kissing - Untangle the Lines

Turn lines that cross into lines that kiss. You will be given two lines that cross at some point. Your job is to untangle the...

18 days ago

Solved

Points on a circle.

This problem is related to <url=http://www.mathworks.com/matlabcentral/cody/problems/1283-points-on-a-sphere>Problem 1283, Point...

18 days ago

Solved

Find the optimal shape to bring the maximum product by a given perimeter

Find the optimal shape (with Nopt sides, where Nopt is at least 3) to bring the maximum product of the sides length, given a spe...

19 days ago

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Geometry: Find Circle given 3 Non-Colinear Points

*This Challenge is to determine the center and radius of a circle given three non-colinear points.* *Input:* Points *Outpu...

19 days ago

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Property dispute!

Two neighbors have rectangular plots of land A and B. The surveyors give you the coordinates of each. If they overlap, there is ...

19 days ago

Solved

Volume difference between Ellipsoid and Sphere

Given an ellipsoid of semi principal axis (a,b,c) find the volume of the difference between this ellipsoid and the sphere with...

19 days ago

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Volume of a Simplex

Return the volume of a <http://en.wikipedia.org/wiki/Simplex regular _n_-simplex> with a unit side length. Results are up to...

19 days ago

Solved

Beads on a Necklace (Convex Hulls)

We may describe a <http://en.wikipedia.org/wiki/Convex_hull convex hull> as a rubber band stretched around a list of points. Som...

19 days ago

Solved

Find the path through the cell

A list of cells is given. Return true if the elements of the list increase monotonically (each element is strictly larger tha...

20 days ago

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Break it up! Break it up!

You have N pennies. Write a Matlab script that will reveal how many different ways you can break up those pennies. For example...

20 days ago

Solved

How many rectangles in a grid ?

How many rectangles are there in an m × n grid ? For example, if m=1 & n=2, we have 3 rectangles.

20 days ago

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Full combinations

Given n input vectors x1, x2, …, xn, generate a p*n matrix y whose rows contain all element-wise combinations of the vectors x1,...

21 days ago

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Addition Partition

You will be given two numbers, N and K. Write a MATLAB function that will determine how many different unique ways you can have...

21 days ago

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Fibonacci Decomposition

Every positive integer has a unique decomposition into nonconsecutive Fibonacci numbers f1+f2+ ... Given a positive integer n, r...

21 days ago

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How many Fibonacci numbers?

Find the number of unique Fibonacci numbers (don't count repeats) in a vector of positive integers. Example: x = [1 2 3 4...

21 days ago

Solved

Fibonacci-Sum of Squares

Given the Fibonacci sequence defined by the following recursive relation, * F(n) = F(n-1) + F(n-2) * where F(1) = 1 and F(1)...

21 days ago

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Predicting life and death of a memory-less light bulb

*💡 💡 💡 💡 💡 💡 💡 💡 💡 💡 💡 💡 💡 💡 &...

21 days ago

Solved

Octoberfest festival

A group of students decided to visit Octoberfest festival. First they ordered one beer, then after half-hour they taken one more...

21 days ago

Solved

Energy of a photon

*⚛ ☢ ⚛ ☢ ⚛ ☢ ⚛* Given the frequency F of a photon in giga hertz. Find energy E of this...

21 days ago