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Problem for beginners

M is a nxm matrix. Swap the fist and the second last column with eachother. X=[1 2 3;4 5 6;7 8 9] Y=[2 1 3;5 4 6;8 7 9]

plus d'un an ago

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Stairs

Make an n by n matrix, where the elements are ones and zeros. In the main diagonal, and under that, there should be only ones (...

plus d'un an ago

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Find Pseudo-Cyclic Number

A cyclic number is an integer in which cyclic permutations of the digits are successive multiples of the number https://en.wikip...

plus d'un an ago

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Optimum Egyptian Fractions

Following problem was inspired by <http://www.mathworks.com/matlabcentral/cody/problems/2126-split-bread-like-the-pharaohs-egypt...

plus d'un an ago

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Pandigital number n°3 (Inspired by Project Euler 32)

After Problem 2319 and 2320. An n-digit number is pandigital if it makes use of all the digits 1 to n exactly ONCE. For examp...

plus d'un an ago

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Square root

Given x (a matrix), give back another matrix, where all the elements are the square roots of x's elements.

plus d'un an ago

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Bridge and Torch Problem - Minimum time

<https://en.wikipedia.org/wiki/Bridge_and_torch_problem Details of the problem ...> Input is crossing time list. (for exampl...

plus d'un an ago

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Moving Product (Easy)

Given an input array A, write a function *movprod(A,k,dim)* to calculate the moving product over a sliding window of length *k* ...

plus d'un an ago

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RISK Calculator - Large Armies, High Accuracy, Fast

This Challenge is to quickly provide the high precision probability of legal RISK battles up to 100 vs 100. [ Attack >= 2 and D...

plus d'un an ago

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Create a matrix map of increasing safety levels

The sole nuclear power plant at Grid City suddenly had a meltdown. Luckily, the plant was designed to be in full automation, so ...

presque 2 ans ago

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Count the number of folds needed to pack a large sheet

In a certain paper factory, large sheets of paper are being made every day. Before sending the sheets for shipment, they have to...

presque 2 ans ago

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Convert a temperature reading from Celsius to an unknown scale

Two of the most famous temperature scales are the Celsius and the Fahrenheit scale. In reality, however, there are so many other...

presque 2 ans ago

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Friday or not

I love Friday. Please tell me whether the day is Friday. Dateformat is 'yyyy-mm-dd' or 'dd-mmm-yyyy' or 'mm/dd/yyyy'. Exa...

presque 2 ans ago

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Count the days

Count the occurrence of a particular day (e.g. Monday) in a given year.

presque 2 ans ago

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Sieve of Eratosthenes - 02

"Sift the Two's and Sift the Three's, The Sieve of Eratosthenes. When the multiples sublime, The numbers that remain a...

presque 2 ans ago

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Projector Matrix

Write a function to determine whether or not the matrix is a projector. Projector matrices are defined as P^2 = P.

presque 2 ans ago

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Sky full of stars - 03

draw the following pattern with asterisks. For example, for n=6 '************' '***** *****' '**** ****' ...

presque 2 ans ago

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Sky full of stars - 02

draw an isosceles triangle with asterisks of size n. For example, for n=6 ' * ' ' *** ' ' **...

presque 2 ans ago

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Sky full of stars - 01

Draw a right triangle with asterisks of size n. For example, for n=5 '* ' '** ' '*** ' '**** ' ...

presque 2 ans ago