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Britney unfolded
You have a long, narrow strip of paper. You are going to fold this strip of paper length-wise in half, than fold the folded stri...

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Sum of digit range
Example: If A is n1, and B is n2 digit positive numbers. A*B's digit range will be [c d] (c = min & d = max). Then return ...

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last n digit of a power function
Calculate the power of a given a base, exponent. Return the last n digit number. Example 1: base = 3; expo = 8; n = 3; ...

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Sum of Dividend Digits
Find the smallest number that consist of only number 1's (e.g. 11111111111) which satisfy a given divisor and remainder. Then re...

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Does this dress make me look fat
For the input string "Does xyz make me look fat" output the string "No, xyz does not make you look fat"

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Decimal Comparison
*Background* A utility of particular interest to Cody and other MATLAB ventures is comparing the equality of two numbers. In ...

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Sorting integers by their digits (Level 1)
Given a vector, v, of positive integers, return a vector, w, by sorting v in ascending order, such that primary sorting is done ...

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Decode a simplified barcode
Given a bar code from this <http://www.mathworks.com/matlabcentral/cody/problems/602-make-a-simplified-bar-code exercise>: Re...

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Convex Hull Capture
Imagine four points in uv that form a square. uv = [ ... 0,0; 0,2; 2,2; 2,0]; Now we have two more po...

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Do the lines intersect?
You are given two line segments. Do they cross? Consider one segment as (x1,y1) to (x2,y2), the other segment as (x3,y3) to (...

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How long is the longest prime diagonal?
Stanislaw Ulam once observed that if the counting numbers are <http://en.wikipedia.org/wiki/Ulam_spiral arranged in a spiral>, t...

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Lah Numbers
Create a square lower diagonal matrix containing the first n Lah number coefficients. In mathematics, the Lah numbers are coeffi...

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Hilbert numbers
Given a positive integer, n, return h as follows: 1. If n is not a <https://en.wikipedia.org/wiki/Hilbert_number Hilbert numb...

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Kurosu checker
The game of Kurosu is simple. A square grid contains cells that can be filled with either a 'X' or an 'O', similarly to a tic-ta...

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Identify the sequence
Given a row vector, x, return 1 if it is an arithmetic series, or 2 if it is a geometric series. If it is neither, return 0. ...

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Return the sequence element I
Given a positive integer, x, return a positive integer, y, which is the xth term in the sequence [1 2 2 3 3 3...], in which one ...

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Polygon division
Given the number of vertices (or sides), n, of a planar convex polygon, return the number of ways, w, in which you can divide th...

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Regular polygon bounded by and bounding a circle
As the number of sides (or vertices) of a regular polygon goes to infinity, its perimeter and area go to the perimeter and area ...

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Toolbox check part 3
In my ongoing quest to highlight obscure parts of MATLAB, the latest challenge is to take 2 string inputs, one a MATLAB toolbox ...

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Back to basics 16 - byte order
Covering some basic topics I haven't seen elsewhere on Cody. Switch the byte order of the input (i.e. if little-endian -> big...

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Spot the outlier
All points except for one lie on a line. Which one is the outlier? Example: You are given a list of x-y pairs in a column ...

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Recaman Sequence - II
Take an arbitrary starting point as input and create Recaman Sequence. Then find the 1, return its index. For example: if n =...

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Matrix Pattern 3

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Repeat string n times - 3
function myOutput = rep_str_3(string1, string2, num1, num2, n) function desiredOutput = rep_str_3('string1', 'STRING2', 0...

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Modular multiplicative inverse
Modular multiplicative inverse is used for _The Chinese Remainder Theorem_ and _RSA algorithm_. You can visit <http://en.wikiped...

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Matrix Pattern 10

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Magic Concentric Circles
Consider 4 magic circle circles around a single number in the sequence 1:n where the sum along the diameters is always equal, an...

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Repeat string n times
* You will be provided a string (s = 'string1_') * a starting point (num1 = 6) (always bigger than or equal to zero) * and n (...

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Juggler sequence revisited
This problem is related to <http://www.mathworks.com/matlabcentral/cody/problems/42835-return-the-sequence-element-ii Problem 42...

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Dealing with correlation results!
In this problem we would like to transform correlation coefficient MATRIX to a VECTOR which includes only unique elements of coe...

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