Christian Schröder

Aktiv seit 2019

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Really enjoying MATLAB!

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Power Times (of the day)
Many times throughout the day can represent mathematical equations. In this problem, we focus on times that represent powers. Fo...

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Compute the totient summatory function
Cody Problem 656 deals with the totient function, denoted by which counts the numbers less than that are relatively prime to ....

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ICFP2024 011:Lambdaman Small programmed solutions
The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

2 Tage vor

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Sum the reciprocals of polygonal numbers
As explained in Cody Problem 60571, a polygonal number is the number of dots arranged in the shape of a regular polygon. For exa...

3 Tage vor

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ICFP2024 010: Lambdaman Optimal-Crawler-Backfill
The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

3 Tage vor

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ICFP2024 008: Lambdaman4 Breadth Solver
The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

3 Tage vor

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ICFP2024 009: Lambdaman Crawler-Backfill
The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

3 Tage vor

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ICFP2024 007: Lambdaman 1, 2, 3 Breadth Solver
The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

3 Tage vor

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ICFP2024 005: Lambdaman 1, 2, 3
The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

14 Tage vor

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ICFP2024 006: Lambda 21 - 3D
The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

15 Tage vor

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Complete a 2nd order difference sequence
In Cody Problem 59791 ChrisR asks us to find the integer that completes a randomly sorted geometric sequence with one missing el...

15 Tage vor

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ICFP2024 004: Lambdaman 10
The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

16 Tage vor

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ICFP2024 003: Lambdaman 5
The ICFP2024 contest was held June 29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship ...

17 Tage vor

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ICFP2024 002: Lambdaman 9
The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

17 Tage vor

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ICFP2024 001: Lambdaman 6
The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship f...

18 Tage vor

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List primes of the form xy+z
Consider three consecutive integers , , and . When is the number prime? For example, if or , then the results are 17 and 37, ...

22 Tage vor

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Perimeter of a Koch snowflake
A Koch snowflake is an iteratively generated (fractal) shape built out of successively smaller equilateral triangles by followin...

23 Tage vor

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Find polygonal numbers that are Blum integers
A polygonal number is the number of dots arranged in the shape of a regular polygon. For example, 15 is a triangular number beca...

27 Tage vor

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Given a Polyshape_01 (ps) Return its Perimeter, Area, and Centroid.
Return the perimeter (P) of a polyshape object, which is the sum of the lengths of its boundaries. Return the total area (A) of...

etwa ein Monat vor

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Jigsaw 002: Intro 2x2 square. Local Cody images
This challenge is to re-assemble camerman.tif and other grayscale images from four 128x128 pieces into a 256x256 image. The prop...

etwa ein Monat vor

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Determine whether a number is a Blum integer
A Blum integer is a semiprime—that is, the product of two distinct primes—whose factors have the form for some integer . The nu...

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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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Compute the number of squares a knight can reach after n moves
Several Cody problems involve knights from chess. They have asked players to find a knight’s tour in a matrix (CP 96), determine...

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Jigsaw 001: Intro 2x2 square. Pieces 128x128
This challenge is to re-assemble camerman.tif in grayscale from four 128x128 pieces into a 256x256 image. The pointer layou...

etwa ein Monat vor

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Write a MATLAB function that takes a positive integer ( n ) as input and returns the sum of all the even numbers from 1 to ( n ).
Write a MATLAB function that takes a positive integer ( n ) as input and returns the sum of all the even numbers from 1 to ( n )...

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Compute a sum of Ramanujan
Srinivasa Ramanujan defined the following function: Write a function to compute for various values of . See also Cody Proble...

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Find jumping medalists

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Compute Khinchin's constant
Khinchin's constant K_0 = 2.684542001... (also written "Khintchine's constant") has the amazing property that it is the limiting...

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Compute the nth Pythagorean prime
Pythagorean primes have the form p = 4n+1, where n is an integer, and they can be written as the sum of squares of two integers....

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Property dispute!
Two neighbors have rectangular plots of land A and B. The surveyors give you the coordinates of each. If they overlap, there is ...

etwa 2 Monate vor

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