Tomoaki Takagi

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Problem 2734. N-th Odious

Created by: Jan Orwat

Tags number theory, oeis, pop series

2

Solutions

40

Size

2

Solutions

40

Size

Problem 2733. Evil Number

Created by: Jan Orwat

Tags easy, number theory, oeis

1

Solution

21

Size

1

Solution

21

Size

Problem 1472. nth Rational Number

Created by: G K

Tags math

1

Solution

49

Size

1

Solution

49

Size

Problem 2690. Armstrong Number

Created by: VIVEK RUHELA

Tags arithmetic, basic matlab

1

Solution

26

Size

1

Solution

26

Size

Problem 1742. Generate a Parasitic Number

Created by: James

Tags parasitic, cyclic

1

Solution

73

Size

1

Solution

73

Size

Problem 156. Parasitic numbers

Created by: the cyclist

Tags parasitic

1

Solution

21

Size

1

Solution

21

Size

Problem 42519. Sum My Indices

Created by: the cyclist

Tags index sum

1

Solution

33

Size

1

Solution

33

Size

Problem 2056. Is this number Munchhausen?

Created by: Ted

Tags math, narcissistic number, munchhausen

1

Solution

30

Size

1

Solution

30

Size

Problem 2248. Bell Number calculator

Created by: robin

Tags sets, partition

1

Solution

35

Size

1

Solution

35

Size

Problem 2493. Must be in the front row...

Created by: James

Tags matrix manipulation, shifting

1

Solution

60

Size

1

Solution

60

Size

Problem 2701. Go to the head of the class!

Created by: James

Tags matrix manipulation

2

Solutions

60

Size

2

Solutions

60

Size

Problem 2442. Magnet and Iron

Created by: rifat

Tags matrix manipulation

1

Solution

109

Size

1

Solution

109

Size

Problem 3094. Hankelize a matrix

Created by: Peng Liu

Tags toeplitz matrix, hankel matrix

1

Solution

28

Size

1

Solution

28

Size

Problem 42501. Toeplitize a matrix

Created by: Peng Liu

Tags toeplitz matrix, hankel matrix

1

Solution

63

Size

1

Solution

63

Size

Problem 2063. A matrix of extroverts

Created by: James

Tags extroverts, not enough narcissism

1

Solution

19

Size

1

Solution

19

Size

Problem 1972. Convert matrix to 3D array of triangular matrices

Created by: Matthew Eicholtz

Tags matlab, matrix manipulation, logical indexing

1

Solution

86

Size

1

Solution

86

Size

Problem 1853. Enlarge array

Created by: Matthew Eicholtz

Tags matrix manipulation

1

Solution

17

Size

1

Solution

17

Size

Problem 1286. MatCAT - Reconstruct X from Its X-rays

Created by: Ned Gulley

Tags matrices

1

Solution

78

Size

1

Solution

78

Size

Problem 3075. Matrix of Multiplication Facts

Created by: James

Tags matrix, factors, elementary_school_math

2

Solutions

75

Size

2

Solutions

75

Size

Problem 1167. matrix zigzag

Created by: trekker

Tags matrix conversion, compression.

2

Solutions

40

Size

2

Solutions

40

Size

Problem 190. Great Circle Distance

Created by: @bmtran (Bryant Tran)

Tags distance, great circle, azimuth

1

Solution

38

Size

1

Solution

38

Size

Problem 193. Smallest distance between a point and a rectangle

Created by: Alfonso Nieto-Castanon

Tags math, distance

1

Solution

37

Size

1

Solution

37

Size

Problem 194. Clockwise or Counterclockwise

Created by: Alfonso Nieto-Castanon

Tags math, polygon

2

Solutions

28

Size

2

Solutions

28

Size

Problem 330. Circumscribed circles

Created by: Alan Chalker

Tags geometry

1

Solution

28

Size

1

Solution

28

Size

Problem 392. Clock Hand Angle 1

Created by: @bmtran (Bryant Tran)

Tags math, clocks, fractions

1

Solution

77

Size

1

Solution

77

Size

Problem 417. Covering area

Created by: Nikolai

Tags area, triangulation, geometrics

1

Solution

16

Size

1

Solution

16

Size

Problem 636. Spherical radius given four points

Created by: Richard Zapor

Tags geometry linear algebra, non-linear

1

Solution

105

Size

1

Solution

105

Size

Problem 637. Volume of a Parallelepiped

Created by: Richard Zapor

Tags vector operators dot cross

1

Solution

14

Size

1

Solution

14

Size

Problem 833. Find third Side of a right triangle given hypotenuse and a side. No * - or other functions allowed

Created by: Richard Zapor

Tags right-angled triangles, non standard methods, right-angle triangles

20

Solutions

37

Size

20

Solutions

37

Size

Problem 1072. Television Screen Dimensions

Created by: @bmtran (Bryant Tran)

Tags plus15, aspect ratio, television

1

Solution

38

Size

1

Solution

38

Size

Problem 1940. Decimation - Optimized for speed

Created by: James

Tags speed optimization, carnage maximus, efficiency

2

Solutions

24

Size

2

Solutions

24

Size

Problem 1401. Implement a bubble sort technique and output the number of swaps required

Created by: Robert Weinberg

Tags sort, bubble sort, bubblesort

1

Solution

73

Size

1

Solution

73

Size

Problem 972. Set a diagonal

Created by: Nicholas Howe

Tags indexing, diagonals

3

Solutions

62

Size

3

Solutions

62

Size

Problem 1092. Decimation

Created by: James

Tags decimate, there can be only one, carnage maximus

1

Solution

66

Size

1

Solution

66

Size

Problem 1366. Finding peaks

Created by: Selvaraaju Murugesan

Tags basic matlab

1

Solution

51

Size

1

Solution

51

Size

Problem 60286. Hofstadter Q sequence

Created by: minnolina

Tags sequence, hofstadter

2

Solutions

49

Size

2

Solutions

49

Size

Problem 60296. Maximizing Stock Profit

Created by: minnolina

Tags easy

1

Solution

36

Size

1

Solution

36

Size

Problem 60416. Secret Message and Acrostic

Created by: minnolina

Tags easy, string, acrostic

1

Solution

13

Size

1

Solution

13

Size

Problem 60511. ICFP 2024 Programming Contest June 28 thru July 1

Created by: Richard Zapor

Tags contest, icfp, json

1

Solution

10

Size

1

Solution

10

Size

Problem 60759. Sum along each diagonal of a matrix

Created by: Matt J

Tags sum, diagonal

1

Solution

45

Size

1

Solution

45

Size

Problem 60778. Complete hydraulic geometry relations

Created by: ChrisR

Tags fluid mechanics, rivers

2

Solutions

46

Size

2

Solutions

46

Size

Problem 60780. Play Hocus Focus

Created by: ChrisR

Tags matrix manipulation, games

2

Solutions

35

Size

2

Solutions

35

Size

Problem 60782. Convert integers from primary notation to base 10

Created by: ChrisR

Tags conversion, number theory

1

Solution

59

Size

1

Solution

59

Size

Problem 60242. CamelCase to snake_case convention

Created by: minnolina

Tags camelcase, snake_case

1

Solution

52

Size

1

Solution

52

Size

Problem 60247. snake_case to CamelCase convention

Created by: minnolina

Tags camelcase, snake_case

1

Solution

53

Size

1

Solution

53

Size

Problem 60306. Add non-triangular numbers

Created by: ChrisR

Tags sum, algebra, sequence

2

Solutions

33

Size

2

Solutions

33

Size

Problem 60661. The Prime Days of Christmas

Created by: Christian Schröder

Tags easy, primes, christmas

2

Solutions

34

Size

2

Solutions

34

Size

Problem 60727. Remove the diagonal of a square matrix

Created by: ChrisR

Tags matrix manipulation, diagonal

1

Solution

41

Size

1

Solution

41

Size

Problem 60176. Find the number of diagonals in a n sided polygon.

Created by: Sahil Islam

Tags polygon, diagonal

1

Solution

15

Size

1

Solution

15

Size

Problem 60729. Organic Chemistry

Created by: Sahil Islam

Tags alkanes, organic chemistry, alkane names

1

Solution

29

Size

1

Solution

29

Size

1 – 50 of 1,544