3 619 total contributions since 2012

Solved

Logistic map

The sequence defined by x_n = 4*r*x_{n-1}*(1-x_{n-1}) and a given 0 < x_1 < 1 turns each x_n into a polynomial of r. Write a ...

plus d'un an ago

Solved

What score did they give?

Your task in this problem is to figure out the most recent score, |S|, submitted. <<https://upload.wikimedia.org/wikipedia/...

plus d'un an ago

Solved

Big Integer Sqrt

You will be given a big integer, you should return the square root of it. input: '16' output: '4' have fun!

plus d'un an ago

Solved

Sum of combinations

Input: *X = 40*, *Y = [40 20 10 4]* Output: *Z = [1 0 0 0; 0 2 0 0; 0 1 2 0; 0 1 1 3; 0 1 0 5; 0 0 4 0; 0 0 3 3; 0 0 2 5; 0 ...

plus d'un an ago

Solved

Nodal Voltage of Resistor Ladder Network

* You have a bunch (an even number N) of identical resistors (each R ohms), a good battery (V volts) and a high impedance voltme...

plus d'un an ago

Solved

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...

plus d'un an ago

Solved

Augmented Lagrange Multiplier (ALM) Method

Write a function to find the values of a design variable vector, _x_, that minimizes a scalar objective function, _f_ ( _x_ ), g...

plus d'un an ago

Solved

Writing Error Messages

Well written functions check inputs to make sure the input is valid. The function ErrorCheck takes three arguments: * a - a s...

plus d'un an ago

Solved

Sherlock Holmes: The Spy Problem

A guest at a party is a spy if this person is not known by any other guest, but knows all of them. There is at most one spy at a...

plus d'un an ago

Solved

Say type of roots in quadratic equation

Given the coefficients of a quadratic equation, write a function that gives the output y='RealDifferent' if the roots are real a...

plus d'un an ago

Solved

Word Distance - Sum

Let's suppose that the distance of a word can be calculated by summing the differences between its letters, having assigned the ...

plus d'un an ago

Solved

Expand 10^n to Powers of 4

Given an integer n, return the coefficients c = [c_n,c_n-1,...,c_0] Such that 10^n = c_n*4^(n) + c_n-1*4^(n-1...

plus d'un an ago

Solved

Aztec Diamond domino tilings

Consider a Cartesian grid, with verteces at integer x and y values, where every four vertices around a vacant space define a uni...

plus d'un an ago

Solved

Toads and Frogs Puzzle

On a one-dimensional board with n + m + 1 cells, there are n counters in the first n cells representing Toads and m counters in ...

plus d'un an ago

Solved

Probabilities - More brains than luck

This problem is related to <http://it.mathworks.com/matlabcentral/cody/problems/596-more-luck-than-brains Problem 596. More luck...

plus d'un an ago

Solved

Determinate if day D is a date that occurs during Daylight Saving Time in Italy

<https://en.wikipedia.org/wiki/Summer_Time_in_Europe>

plus d'un an ago

Solved

Binary code for an analog signal

Digitization of a signal consists of 3 stages: sampling, quantization and encoding. Sampling convert the analogue signal into...

plus d'un an ago

Solved

Permutation Via Multiplication

Given two numbers a and b, determine if the product ab is a permutation of the digits of a. For example, this is always true for...

plus d'un an ago

Solved

Project Euler 249: Prime Subset Sums

Inspired by Problem 249 of Project Euler. <https://projecteuler.net/problem=249> Let S = {2, 3, 5, ...} be the set of prime ...

plus d'un an ago

Solved

Exponents in Factorials(hard)

This is problem is a harder version of "Problem 44747. Exponents in Factorials". <https://ww2.mathworks.cn/matlabcentral/cody/p...

plus d'un an ago

Solved

Large Sum (inspired by Project Euler 13)

Your function will be provided an arbitrary number of numbers of arbitrary sizes as a cell array of strings. Some numbers will b...

plus d'un an ago

Solved

Differential equation and events

You have to solve the non-linear time variant differential equation: (cos(y)+2)*y''+atan(y)*sin(0.01*t)^2+y*sin(0.5*t)=0 ...

plus d'un an ago

Solved

Pumpkin Pie!

It's time for desert at Thanksgiving. You've all gathered at grandma's house, and she's about to start cutting the pumpkin pie. ...

plus d'un an ago

Solved

Back to basics: adding comments to your code

One of the most useful skills a programmer can develop is the skill — or habit — of writing descriptive comments within/above th...

plus d'un an ago

Solved

Apply Function to Each Field of a Structure Array: Part 2

The builtin <http://www.mathworks.com/help/matlab/ref/structfun.html?=structfun structfun> applies a function handle to each fie...

plus d'un an ago

Solved

Apply Function to Each Field of a Structure Array: Part 1

The builtin <http://www.mathworks.com/help/matlab/ref/structfun.html?=structfun structfun> applies a function handle to each fie...

plus d'un an ago

Solved

Win all the time!

This is a 2-players game. One of them is your algorithm. Your algorithm must win in all games. In this game there are 3 rows...

plus d'un an ago

Solved

Wrecked Angles?

It's time for some simple geometry fun to start off the new year. You will be given the perimeter P and the area A of a recta...

plus d'un an ago

Solved

The other half of the Fibonacci sequence

The <http://mathworld.wolfram.com/FibonacciNumber.html "Fibonacci sequence"> — F = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144,...

plus d'un an ago