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Algorithm101

Invert values Description: Given a set of numbers, return the additive inverse of each. Each positive becomes negatives, and the negatives become positives. invert([1,2,3,4,5]) == [-1,-2,-3,-4,-5] invert([1,-2,3,-4,5]) == [-1,2,-3,4,-5] invert([]) == [] You can assume that all values are integers. Do not mutate the input array/list. Solution: 1. Get the numbers in the array. 2. Change positive numbers to nega.. 2022. 3. 27.
How many pages in a book? Description: Every book has n pages with page numbers 1 to n. The summary is made by adding up the number of digits of all page numbers. Task: Given the summary, find the number of pages n the book has. Example If the input is summary=25, then the output must be n=17: The numbers 1 to 17 have 25 digits in total: 1234567891011121314151617. Be aware that you'll get enormous books having up to 100... 2022. 3. 26.
Sum of Digits / Digital Root Description: Digital root is the recursive sum of all the digits in a number. Given n, take the sum of the digits of n. If that value has more than one digit, continue reducing in this way until a single-digit number is produced. The input will be a non-negative integer. Examples 16 --> 1 + 6 = 7 942 --> 9 + 4 + 2 = 15 --> 1 + 5 = 6 132189 --> 1 + 3 + 2 + 1 + 8 + 9 = 24 --> 2 + 4 = 6 493193 --> .. 2022. 3. 23.
Dashatize it Description: Given a variable n, If n is an integer, Return a string with dash'-'marks before and after each odd integer, but do not begin or end the string with a dash mark. If n is negative, then the negative sign should be removed. If n is not an integer, return an empty value. Ex: dashatize(274) -> '2-7-4' dashatize(6815) -> '68-1-5' Solution: 1. If 'n' is not a number, 'None' is returned. 2.. 2022. 3. 22.
Data Reverse Description: A stream of data is received and needs to be reversed. Each segment is 8 bits long, meaning the order of these segments needs to be reversed, for example: 11111111 00000000 00001111 10101010 (byte1) (byte2) (byte3) (byte4) should become: 10101010 00001111 00000000 11111111 (byte4) (byte3) (byte2) (byte1) The total number of bits will always be a multiple of 8. The data is given in a.. 2022. 3. 21.
Multiplication table Description: Your task, is to create NxN multiplication table, of size provided in parameter. for example, when given size is 3: 1 2 3 2 4 6 3 6 9 for given example, the return value should be: [[1,2,3],[2,4,6],[3,6,9]] Solution: 1. Use the for statement twice to create a two-dimensional array. 2. The numbers in the given array are added in the second for statement. 3. Returns the numbers in a t.. 2022. 3. 19.

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