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Classify numbers as abundant, deficient, or perfect
A number is perfect if the sum of its proper divisors (i.e., divisors excluding the number itself) is equal to itself. For examp...

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Determine whether a property description closes
The arrival of summer makes think back to the summers I spent working for my father’s engineering firm. For the first several s...

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Family Savings Analysis
Given the bank accounts of individuals defined by a list of tuples containing the last name, first name, and savings: accounts ...

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Determine the mass of a bat which strikes a ball
Given the speed, the force of the impact and the length of the trajectory calculate the mass of the bat which the player holds p...

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Determine the potential energy in a springrope which hangs over from a bridge
The task is to figure out the energy a person with mass has when hung on a rope over a bridge when given the length from the sus...

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Area of right triangle
Given a hypotenuse and a leg , calculate the area of right triangle.

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Travel a path
In Cody Problem 60251, minnolina asks us to determine the end point given a string indicating unit movements forward, backward, ...

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Add non-triangular numbers
The nth triangular number is the sum of the first n positive integers. The sequence of triangular numbers starts 1, 3, 6, 10, 15...

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Rotate matrix 60 degrees
Given a 2*m-1 by 4*m-3 matrix in which certain elements form a hexagon of side length m, rotate the hexagon 60 degrees countercl...

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Minimize a quadratic function
Write a function to minimize the function . The coefficients a, b, and c will be positive. Give the coefficients in a vector coe...

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Maximizing Stock Profit
As a stock exchange broker focusing on a single transaction, your goal is to maximize profit by buying a stock at a low price an...

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Stern-Brocot Sequence
The Stern-Brocot diatomic sequence is defined as follows: The first elements of the sequence are 0, 1, 1, 2, 1, 3, 2, 3, 1, 4...

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Hofstadter Q sequence
The Hofstadter G sequence is defined as follows: The first elements of the sequence are 1, 1, 2, 3, 3, 4, 5, 5, 6, 6. Write ...

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Hofstadter H sequence
The Hofstadter G sequence is defined as follows: The first elements of the sequence are 0, 1, 1, 2, 3, 4, 4, 5, 5, 6. Write ...

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Hofstadter G sequence
The Hofstadter G sequence is defined as follows: The first elements of the sequence are 0, 1, 1, 2, 3, 3, 4, 4, 5, 6. Write ...

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Interval Compression
Given a set of integers, the task is to create a list of closed intervals where each interval includes its endpoints. For exampl...

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Final Stone Weight
You are given an array with weights of stones. The objective is to determine the weight of the final stone remaining after all c...

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Instructions Following
Complete the function follow(s) which, for a given string (containing only the letters 'f', 'b', 'l', 'r'), calculates the final...

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snake_case to CamelCase convention
The snake_case naming convention writes words in lowercase and separates them with underscores. In CamelCase convention, the fir...

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CamelCase to snake_case convention
The CamelCase naming convention capitalizes the first letter of each word. In snake_case convention, words are written in lowerc...

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Finding the Most Frequent Letter in a Text
You are given a text containing various English letters, digits and punctuation symbols. Your task is to find the most frequentl...

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Spreadsheet Column Number
Spreadsheet uses an alphabetic naming system for columns, starting with 'A', 'B', 'C', etc. The column names continue like 'AB',...

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Perfect shuffle
We call "perfect shuffle" the process of cutting a deck of cards into two equal halves, and then perfectly interleaving them: on...

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Battery Charge Indicator
Write a function called battery_charge that visually represents the charge of a battery. The function takes an integer paramete...

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Remove Unique Elements
Given a list of integers, we want to keep only the non-unique elements in this list. To do this, we need to remove all the uniqu...

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Find the largest sum of any contiguous subarray
Given an array of N integers, find the contiguous subarray (which must contain at least one number) with the maximum sum and ret...

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Find Next Strictly Greater Element
Given an array of numbers, create a new array where each element represents the next strictly greater element to the right of th...

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Find the triplet
Given an array x of size n > 3 and an integer N, return the indices of three elements in the array that sum up to the given inte...

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Absolute Sorting
Given an array with various numbers, your have to sort it by absolute value in ascending order. For example, for the array [-2...

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Reverse Integer
You are given an integer, reverse its digits. For negative integers, the sign should remain in the front. For instance, 12340 s...

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