# Lincoln Poon

A university student working his way through programming.

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**Content Feed**

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Draw a x-by-x matrix 'Denmark flag'(Euro(2020)

Draw a x-by-x matrix 'Denmark flag' using '4' and '1'.(x is odd and bigger than 4) Number 4: Caption S.Kjær and number 1: K.S...

4 months ago

Solved

Draw matrix 'Swiss flag'( Euro 2020)

Draw a x-by-x matrix 'Swiss flag' using '1' and 0.(x is odd and bigger than 4) Example x=5 ans = [1 1 1 1 ...

4 months ago

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Surface Fit z(x,y)

Given three vectors x,y,z. Find four coefficients c = [cxx cxy cyy c00], such that z = cxx*x.^2+cxy*x.*y+cyy*y.^2+c00. For e...

4 months ago

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GJam March 2016 IOW: Polynesiaglot Small

This Challenge is derived from <http://code.google.com/codejam/contest/8274486/dashboard#s=p2 GJam March 2016 Annual I/O for Pol...

4 months ago

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Gallery function, learning

write a Function, edit something or Add something that give us like the following for random n: n=2 ans= [ 0 1 ...

4 months ago

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Where's Waldo?

Find the string 'Waldo' in the character matrix given and return the indices of where you found him as a 4x2 matrix where the el...

4 months ago

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Minimum jumps to reach end of the array

Given an array of integers where each element represents the max number of steps that can be made forward from that element. Ste...

4 months ago

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List the households affected by leaks in water distribution

Consider the following water distribution network, where water is pumped uni-directionally from left to right: 8...

4 months ago

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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...

4 months 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...

4 months ago

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Opposite point of the earth, what is the antipodal of a point ?

Given two strings(lat and long) that represent the geographic coordinates of a point in the earth, you have to find out what is ...

4 months ago

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Given a base n, find the y values less or equal than 100(without 1), such that they will never produce a periodic number if we divide any whole number between some of them

A periodic number depends on the base b where we are working. So, for example the number 2/3 in decimal base is periodic(0.666...

4 months ago

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Get the variable value from a string and generate sum

Get the variable value from a string. Example. x = 'A=10' y = 'B=20' Result = (x+y) Result = 30

4 months ago

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CowBoy

A group of cowboys standing in circle form. They have one gun. The first cowboy shoot the cowboy beside him (second one) and giv...

4 months ago

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jogging?

Imagine x-y coordinate system and you are at the origin and your partner is on the x-axis at some small distance (d) away from y...

4 months ago

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How many palindromes?

* Given a set of letters, count all possible palindromes, using all of those letters. * For example, if the set is {'A' 'A' 'A'...

4 months ago

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Parsing Expressions - Binary Arithmetic Operators I

Parse and evaluate expressions like these: '1 + 2' '51 - 78' '42 * 9' The only operators are +, -, *. Both argu...

4 months ago

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X O X O

On a noughts and crosses board, how many possible unique combinations are there given a square grid of length n? Assumptions/...

4 months ago

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Cell Operator *

Please implement operator * for cell: >> {2,3} * 2 ans = 1×4 cell array [2] [3] [2] [3] >> {2,3} * [2 3]...

4 months ago

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create a function that give us like the following

x=3 y= [1 -1 -1 0 1 -1 0 0 1]; -------------------------------- x=5 y= [ 1 -1 -...

4 months ago

Solved

Balanced Ternary Numbers: Easy as |, |-, |o

This problem concerns the so-called <http://en.wikipedia.org/wiki/Balanced_ternary balanced ternary> system for representing num...

4 months ago

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Penny Distribution Machine

A machine consists of a row of boxes. To start, one places N pennies in the leftmost box. The machine then redistributes the pen...

4 months ago

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possible ways through matrix

This problem is inspired from problem 2405 <https://www.mathworks.com/matlabcentral/cody/problems/2405-the-number-of-ways>. C...

4 months ago

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The Number of Ways

Find all the possible ways to reach the end of a matrix. So given [a b c d] the possible ways [a c],[a d],[b c],[b ...

4 months ago

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Repopulate the City

For any population p of positive integers between pmin and pmax, we can calculate histogram count n for a list of evenly dividin...

4 months ago

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compare strings

Given 2 strings and 3 actions (Insert,delete,replace) on characters. Find the difference between two strings. Example: str...

4 months ago

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Create Combination

Motivation: In many problems, we need to create combinations with the function nchoosek. In some cases, however, choices are lim...

4 months ago

Solved

Get ranking of a combination looking for speed.

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...

4 months ago

Solved

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...

4 months ago