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Solved

Project Euler: Problem 11, Largest product in a grid

What is the greatest product of _k_ adjacent numbers in the same direction (up, down, left, right, or diagonally) in a _n×n_ gri...

circa 2 mesi ago

Solved

Create the Ulam spiral

Have you ever seen this wonderful spiral ? The Ulam Spiral is arranging prime numbers in a clockwise spiral starting in 0. Give...

circa 2 mesi ago

Solved

Get the n-th rand number with given seed

Given seed s, return the n-th rand number using rand(). Round the answer with 4 digits. n is a postive integer.

circa 2 mesi ago

Solved

Area of a regular hexagon

Given the length of a side of a regular hexagon, return its area rounded to two decimal places.

2 mesi ago

Solved

Draw "T" inside a Zero Matrix

Given a x-by-x matrix filled with zeros (x> 2). Use 1 to draw a letter "T" into it! Like this: x = 5, y = 1 1 1 1 1 0 0 1 0 0...

2 mesi ago

Solved

Add the number of horizontal and vertical movements to each matrix element

Given n, create a square matrix and with element (1,1) = 1, add 1 to each element for each horitizonal and vertical movement. E...

2 mesi ago

Solved

Classify product/digit-sum sequences

Cody Problem 53120 involved a sequence in which a term is computed by multiplying the previous two terms and adding the digits o...

2 mesi ago

Solved

Compute the Sequence of the Day

A sequence starts with 1 and 2, and each subsequent term is the sum of the digits of the product of the previous two terms. As a...

2 mesi ago

Solved

Draw the symbol '+'

Draw '+' in an x-by-x matrix (where x is odd and x >3) Example: x = 5 y = [0 0 1 0 0 0 0 1 0 0 1 1 1 1 1 0 ...

2 mesi ago

Solved

Easy Sequences 30: Nearly Pythagorean Triangles

A Nearly Pythagorean Triangle (abbreviated as "NPT'), is an integer-sided triangle whose square of the longest side, which we wi...

5 mesi ago

Solved

Easy Sequences 51: Positive Gaussian Primes

A Gaussian Prime is a gaussian integer that cannot be decomposed as product of two non-unit gaussian integers (the complex units...

5 mesi ago

Solved

Easy Sequences 9: Faithful Pairs

A "faithful number" is a non-prime number that is one less or one more than some prime number but not both. For example, for num...

5 mesi ago

Solved

Easy Sequences 58: Curious Prime-Rational Functions

For some prime numbers and where , a rational function , is defined as follows: . Using the output , another rational functi...

5 mesi ago

Solved

Performance - summation

Given a vector of natural numbers x = [1,2,3,...,N] compute the sum of its elements by not stressing the machine too much...

5 mesi ago

Solved

Probabilities - Balls and urns - 01

The urn contains B blue balls and R red balls. Each trial consists of drawing one random ball from the urn and observing its col...

5 mesi ago

Solved

Easy Sequences 53: Greatest Proper Divisor

The greatest proper divisor () of an integer is the largest integer , such that and . Furthermore, we define: . Below is the...

5 mesi ago

Solved

Easy Sequences 55: "Ugly" Rectangles?

A positive integer is called a regular number, if and only if there exist a non-negative integer , such that . For some reason...

5 mesi ago

Solved

Easy Sequences 3: Prime 44-number Squares

The positive integers 62 and 238 are related. Their squares (3844 and 56,644) both end in '44'. In fact, 62 and 238 are the 3rd ...

5 mesi ago

Solved

Easy Sequences 1: Find the index of an element

The nth element of a series is defined by: . Obviously, the first element . Given the nth element , find the value of the corre...

5 mesi ago

Solved

Easy Sequences 56: Counting "Ugly" Numbers

A positive integer is called a regular number, if and only if there exist a non-negative integer , such that . For some reason...

5 mesi ago

Solved

Multiply Large Hexadecimal Numbers

Multiply two large hexadecimal numbers together and output the hexadecimal representation of the result. For example: a='abcde...

5 mesi ago

Solved

Verify Law of Large Numbers

If a large number of fair N-sided dice are rolled, the average of the simulated rolls is likely to be close to the mean of 1,2,....

5 mesi ago

Solved

Determine the number of odd integers in a vector

Determine the number of unique odd integers in a vector. Examples: Input x = [2 5 8 3 7 1]; Output y = 4; Inp...

5 mesi ago

Solved

Volume difference between Ellipsoid and Sphere

Given an ellipsoid of semi principal axis (a,b,c) find the volume of the difference between this ellipsoid and the sphere with...

5 mesi ago