# GeeTwo

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Proud father, underwater acoustician, FIRST robotics volunteer, once and future FIRST mentor

**Programming Languages:**

C++, C, Java, Javascript, MATLAB, SQL, HTML, CSS, Arduino, Shell, Assembly, Fortran

**Spoken Languages:**

English

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**Feeds**

Solved

Create Combination

Motivation: In many problems, we need to create combinations with the function nchoosek. In some cases, however, choices are lim...

2 months ago

Solved

Usage of java.math : N Choose K with unlimited precision

Calculate the binomial coefficient nchoosek with full accuracy. This challenge may use the wonderful word of java.math that allo...

2 months ago

Solved

Get ranking of a combination looking for speed.

I have the numbers pulled without replacement from the set [1 2 3 4 5 6 7 8 9 10 11 12 13]; They are then ordered from least to...

2 months ago

Solved

Get ranking of a combination

I have the numbers pulled without replacement from the set [1 2 3 4 5 6 7 8 9 10 11 12 13]; They are then ordered from least to ...

2 months ago

Solved

Put m balls into n boxes (again)

According to Cody Problem 1516, if I put 3 balls into 2 boxes then 1 1 1 1 1 2 1 2 2 ...

2 months ago

Solved

Put m balls into n boxes

Can you find all the cases where, if I put 3 balls into 2 boxes the case is 1 1 1 1 1 2 1 ...

2 months ago

Solved

Numbered lottery balls into cells

You are running a lottery, and have a number of different balls numbered 1 to N. Your job is to figure out how many different w...

2 months ago

Solved

A (wrong) place for everything, and everything in its (wrong) place

You have an equal number of cups and balls, each labelled from one to N. You randomly place one ball in each cup. Determine th...

2 months ago

Solved

Possible Outcomes of American Roulette

The payout for American roulette can be calculated by: payout = (38/n)-1 where n is the number of squares the bet covers. ...

2 months ago

Solved

NCHOOSEK - Time Optimization

Input V —— Set of all choices, a vector of N, 1 < N < 100 K —— Number of selected choices, a scalar, 0 <= K <= N Output C ——...

2 months ago

Solved

Combinations without using nchoosek

You have to generate a matrix with all possible combinations of n elements *taken 2* at a time, *without using nchoosek(1:n,2)* ...

2 months ago

Solved

Which permutation is it?

Let write some permutations of positive integers. 1: 1 2 3 4 5 6 ... 2: 2 1 3 4 ... 3: 1 3 2 4 ....

2 months ago

Solved

N-th permutation.

Let write some permutations of positive integers. 1: 1 2 3 4 5 6 ... 2: 2 1 3 4 ... 3: 1 3 2 4 ... ...

2 months ago

Solved

Diophantine Equations (Inspired by Project Euler, problem 66)

Consider the quadratic Diophantine equation of the form: x^2 – Dy^2 = 1 When D=13, the minimal solution in x is 649^2 – 13...

2 months ago

Solved

High Precision Square Root (Inspired by Project Euler 80)

Given a positive integer n which is not a perfect square, write a MATLAB script that will calculate the square root of n truncat...

2 months ago

Solved

Decrypt the cypher using XOR encryption (for beginners)

Inspired by Project Euler n°59 Each character on a computer is assigned a unique code and the preferred standard is ASCII (...

2 months ago

Solved

I've got the power! (Inspired by Project Euler problem 29)

Consider all integer combinations of a^b and b^a for the integer values 2 ≤ a ≤ 4 and 2 ≤ b ≤ 5: 2^2=4, 2^3=8, 2^4=16,...

2 months ago

Solved

Repopulate the City

For any population p of positive integers between pmin and pmax, we can calculate histogram count n for a list of evenly dividin...

3 months ago

Solved

Compute the Lagarias Riemann Hypothesis sequence

Write a function that takes an input number and produces a sequence (i.e., all values up to and including the th value) compute...

3 months ago

Solved

Compute the unitary totient of a number

The totient function , the subject of Cody Problems 656 and 50182, gives the number of integers smaller than that are relativel...

3 months ago

Solved

List the nth term of Rozhenko’s inventory sequence

Consider a sequence constructed by repeated inventories. A new inventory begins each time a zero is encountered. The first few i...

3 months ago

Solved

Count estrangements

Recently I made a puzzle for my wife that included a cryptogram, which involves an arrangement of the letters A through Z. I use...

3 months ago

Solved

Trap a knight

Consider a knight on an infinite chessboard labeled with numbers spiraling outward. A knight starting on the square labeled 1 ca...

3 months ago

Solved

Compute the Tetris sequence

In the Tetris sequence, which starts with a 1, the next term is the smallest positive integer not already in the sequence that h...

3 months ago

Solved

Flip the parity of digits in a decimal expansion

The number 349 has the decimal expansion . If we change the even digits from positive to negative, then the number becomes 269 (...

3 months ago

Solved

Compute the largest number with a given integer complexity

Cody Problems 42831 and 42834 ask us to compute integer complexity, the smallest number of 1s needed to construct a number with ...

3 months ago

Solved

Sum the unitary divisors of a number

Cody Problems 1933 and 46898 deal with , the sum of divisors function. This problem deals with , the sum of unitary divisors fun...

3 months ago

Solved

Count the unitary divisors of a number

Cody Problem 56738 asks for a list of the unitary divisors of a number. For this problem, write a function to count the unitary ...

3 months ago

Solved

List numbers that are not squares

The numbers 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 17, etc. are not perfect squares. Write a function to list the th term in ...

3 months ago

Solved

Count the peaceful queens

In a 5x5 chessboard with a queen of one color (white, say) on the perimeter, one can place 12 black queens on the board such tha...

3 months ago