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Risolto
Express numbers as the sum of a prime, a square, and a cube
While traveling on an interstate highway, I noticed a sign that gave distances to three places. The distances were 3, 8, and 9 m...
1 giorno fa
Risolto
Find the minimum element coprime to the rest in a set of 10 consecutive integers
In this video, Dr Barker argued that a set of 10 consecutive integers must have at least one integer coprime to the rest. For ex...
7 giorni fa
Risolto
Solve an ODE: Ekman spiral on a solid surface
Problem Write a function to solve for and as a function of in this system of ordinary differential equations: where , ...
7 giorni fa
Risolto
Array GCD
* Find Greatest Common Divisor in a given array * Function Template: function ans = arraygcd(a) % a=[45 15 200 ...
29 giorni fa
Risolto
Update course numbers and abbreviations
Suppose that the educational institution where you teach purchases new software to handle many essential functions, including co...
29 giorni fa
Risolto
Find the index of n in magic(n)
If input n=5, then magic(n) is 17 24 1 8 15 23 5 7 14 16 4 6 13 20 22...
circa un mese fa
Risolto
Quasi-Carmichael Numbers
Determine if the provided inputs are Quasi-Carmichael numbers and output a logical matrix of the same size as the input.
circa un mese fa
Risolto
Beam me up, Scotty!
It's the mid 22nd century. You, Montgomery Scott, are appointed the chief engineer of the Starship Enterprise. The Starship is...
circa 2 mesi fa
Risolto
Compute the polylogarithm for real arguments
The polylogarithm appears in quantum statistics and quantum electrodynamics, and for special cases of and , it connects to the...
circa 2 mesi fa
Risolto
List ways to make a sum in Killer Sudoku
In Sudoku, the subject of several Cody problems, one tries to arrange the digits 1 through 9 in a 9x9 grid of 81 cells (or a 3x3...
circa 2 mesi fa
Risolto
Compute a sum involving the zeta function
Write a function to compute the sum for , where is the zeta function, the subject of Cody Problems 45939, 45988, and 45997.
circa 2 mesi fa
Risolto
Count paths between corners of a grid that remain on or below the diagonal
Consider motion from the lower left corner of a square grid to the upper right corner. The motion is constrained in two ways: (1...
2 mesi fa
Risolto
Determine aquifer properties: slug test
An important task in characterizing the flow of groundwater is to determine the properties of the aquifer, or the underground wa...
2 mesi fa
Risolto
Integrate a power tower
Write a function to compute this integral where . That is, the integrand is x to the x to the x to the x to the...
3 mesi fa
Risolto
Count the ones in a divisibility matrix
Cody Problem 59506 asked solvers to compute the determinant of matrix consisting of ones in the first column and anywhere the ro...
3 mesi fa
Risolto
Compute the determinant of a divisibility matrix
Consider a matrix consisting of ones in the first column and anywhere the row index divides the column index. The 4x4 matrix is ...
3 mesi fa
Risolto
Compute the sum of distances from a point to the sides of an equilateral triangle
Write a function to compute the sum of the (shortest) distances from a point inside an equilateral triangle to the sides of the ...
3 mesi fa
Risolto
Compute the total length of lines between all vertices of a regular polygon
Write a function to compute the total length of between all vertices of a regular polygon inscribed in a unit circle. For exampl...
3 mesi fa
Risolto
Find a Pythagorean triple
Given four different positive numbers, a, b, c and d, provided in increasing order: a < b < c < d, find if any three of them com...
4 mesi fa
Risolto
Roman to Integer Conversion
The idea behind this cody problem is to write a code that converts the Roman Numerals to Integers. A numeral system known as R...
4 mesi fa
Risolto
nxn matrix with elements from 1:n^2
really simple once you see what the matrix is supposed to look like. i appreciate what seems to be a clever approach to solving ...
4 mesi fa
Risolto
Construct numbers from antidiagonals of stacks of binary numbers
A sequence is constructed in the following way: Express the numbers 1, 2, 3, 4, 5,… in binary and stack them, right-justified. T...
4 mesi fa
Risolto
List lunar triangular numbers without duplication
Triangular numbers—which are the subject of Cody Problems 5, 291, 44289, 44732, 45833, 55680, 55695, and 55705—are the sums of c...
4 mesi fa
Risolto
Calculate the Number of Sign Changes in a Row Vector (No Element Is Zero)
For a row vector: V=[7 1 2 -3] there is one sign change (from 2 to -3). So, the function you write must return N=1. F...
4 mesi fa
Risolto
Count integers in randomized vector that are multiples of a given number.
The mod() function We might all remember the days when we were taught to divide and then set the remainder aside if the numbers...
4 mesi fa
Risolto
Bullseye Matrix with Zeros
Inspired by Problem 18, create a bullseye matrix with the addition of padding equal to 0 between concentric rings. Matrices are ...
4 mesi fa
Risolto
Determine whether a number is a Zeisel number
Do you know what is interesting about the number 1729? That’s right: it’s the third Zeisel number, a number given by , where ...
4 mesi fa
Risolto
Determine if a number is a cool number
A number is considered cool if it is 3 digits, has a 5 in it, and is divisible by 4.
4 mesi fa