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LIFO Validation
Write a function to check whether a LIFO (Last In First Out) restriction on inventory is violated. We have two input vectors ...

2 months ago

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Fixed-Point Iteration
Perform fixed-point iteration to estimate the root of a nonlinear equation.

2 months ago

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Graceful Double Wheel Graph
<http://en.wikipedia.org/wiki/Graceful_labeling Graceful Graphs> are the topic of the <http://www.azspcs.net/Contest/GracefulGra...

2 months ago

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Minimum Sum thru a Lower Triangle
This Challenge is to find the minimum cumulative sum that traverses from row-1 thru row-N via vertical/diagonal adjacent element...

2 months ago

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GJam 2013 China Event: Happy Teams 100 Pairs
This Challenge is derived from <http://code.google.com/codejam/contest/2933486/dashboard#s=p0 GJam 2013 China Bad Horse> partial...

2 months ago

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GJam 2013 China Event: Happy Teams
This Challenge is derived from <http://code.google.com/codejam/contest/2933486/dashboard#s=p0 GJam 2013 China Bad Horse>. The pr...

2 months ago

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GJam: 2013 China Event: Name Sorting
This Challenge is derived from <http://code.google.com/codejam/contest/2933486/dashboard#s=p2 GJam 2013 China Moist>. The proble...

2 months ago

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GJam: 2013 China Event: Cannon Angle
This Challenge is derived from <http://code.google.com/codejam/contest/2933486/dashboard#s=p1 GJam 2013 China Captain Hammer>. T...

2 months ago

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realsmall
Please return the smallest positive number. This is a little silly problem, but the solution has some funny properties...

2 months ago

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GJam:2013 World B: MAD Drummer
This Challenge is derived from the <http://code.google.com/codejam/ Google Code Jam 2013 World Championship>. The <http://code.g...

2 months ago

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Usage of mkdir and copyfile
This Challenge is to copy a file into a new directory multiple levels below existing directory architecture. System appears ...

2 months ago

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MiniMax
Find the smallest value in array, which is the maximum of its row and column. Example: in array shown below are two numbers w...

2 months ago

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Remove TeX from string
Matlab’s TeX support in figure windows is great for displaying information in a visually appealing way. However, many of the TeX...

2 months ago

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Repeat middle rows and columns of an array
Given an MxN numeric array (A), return an array (B) in which the middle rows and columns have each been repeated once. It may be...

2 months ago

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Molecule Atomic Wt (CHONS) Molecules
Given a molecular equation string determine its atomic weight. Limited atoms of C H O N and S where wts are rounded to [12 1 16...

2 months ago

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Free Fall analytical solution (Chapra 2012 textbook Example 1.1)
Analytical solution to bungee jumper problem. Given time series as a vector, parameters mass and drag coefficient, and gravit...

2 months ago

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Optimally fill a container with elements of different sizes
Given a row vector V of different numerical values and a size limit L, return a 1x2 vector A, containing (a) the largest sum of ...

2 months ago

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rot45 : a different aproach
Inspired by problem 1840. http://www.mathworks.com/matlabcentral/cody/problems/1840-rotate-matrix-clockwise-45-degree Given an...

2 months 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 ...

2 months ago

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Negation and new variables
Inspired by Problem 1827 by Andrew Newell. Write a function that has the following property: (x~=y) neg3(x)=x; neg3...

2 months ago

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Usage of java.math : Add, Multiply, Pow
This challenge is an introduction to the wonderful word of java.math that allows unlimited precision calculations. The primary ...

2 months ago

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Dilate a 3d object sampled on a regular grid
3d objects can be described by a set of points on a regular grid in Euclidean space. Given the n x 3 matrix m defining some numb...

2 months ago

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Get me! v3
A harder version of Get me! I *think* I only left one door open.. we could be close to a perfect anti-cheating engine,

2 months ago

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Get me! v2
Exploiting cody v2

2 months ago

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Get me!
Inspired by Now! problems. Do your best!

2 months ago

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singularity 2.0 (easier)
If you have been in Cody long enough you have probably run across some badly constructed problems and test suites. This prob...

2 months ago

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Metamorphosis
Inspired by problem <http://www.mathworks.com/matlabcentral/cody/problems/866-community-problem-500 866>. Can you make your c...

2 months ago

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Can you beat the lottery again (for hardcore coder) ?
Inspired by the Problem 1713 by Chris E. Here is the code that generates the first lottery number: rng('shuffle'); numb...

2 months ago

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Primes for Large N: 2^30, System Memory Limit
This Challenge is to further improve the "primes" function for speed/memory usage to the Limit of Cody Memory. The Matlab fun...

2 months ago

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Primes Faster for Large N
This Challenge is to improve the "primes" function for speed. This may be accomplished by fixing memory usage. The Matlab fun...

2 months ago