# Cody Challenge

Curated by : Cody Team

Average Problem Difficulty:

Cody Challenge Master

+50 points

Problem Title Likes Solvers Difficulty

#### Problem 10. Determine whether a vector is monotonically increasing

Created by: Cody Team

152

19969

#### Problem 69. Find the peak 3n+1 sequence value

Created by: Cody Team

Tags 3n+1

23

2460

#### Problem 63. Encode Roman Numerals

Created by: Cody Team

Tags encoding

16

1906

#### Problem 72. Interpolator

Created by: Cody Team

39

3353

#### Problem 38. Return a list sorted by number of occurrences

Created by: Cody Team

18

2728

#### Problem 52. What is the next step in Conway's Life?

Created by: Cody Team

Tags life, automata

29

642

#### Problem 19. Swap the first and last columns

Created by: Cody Team

107

19697

#### Problem 68. Kaprekar Steps

Created by: Cody Team

27

2259

#### Problem 87. Indexed Probability Table

Created by: Cody Team

Tags matlab

10

2428

#### Problem 8. Add two numbers

Created by: Cody Team

250

40259

#### Problem 5. Triangle Numbers

Created by: Cody Team

Tags math, triangle, nice

136

26518

#### Problem 93. Calculate the Levenshtein distance between two strings

Created by: Cody Team

25

1406

#### Problem 88. It dseon't mettar waht oedrr the lrettes in a wrod are.

Created by: Cody Team

Tags regexp, strings

23

1734

#### Problem 67. Find common elements in matrix rows

Created by: Cody Team

Tags matlab

22

2606

#### Problem 81. Mandelbrot Numbers

Created by: Cody Team

15

1690

#### Problem 92. Find state names that start with the letter N

Created by: Cody Team

Tags regexp, states

7

1194

#### Problem 6. Select every other element of a vector

Created by: Cody Team

188

31926

#### Problem 85. Remove the polynomials that have positive real elements of their roots.

Created by: Cody Team

Tags matlab

5

1656

#### Problem 83. Prime factor digits

Created by: Cody Team

Tags primes

24

2241

#### Problem 36. Find relatively common elements in matrix rows

Created by: Cody Team

Tags matlab

13

2027

#### Problem 91. Get the area codes from a list of phone numbers

Created by: Cody Team

Tags regexp

8

1047

#### Problem 23. Finding Perfect Squares

Created by: Cody Team

Tags sets

162

17738

#### Problem 65. Word Counting and Indexing

Created by: Cody Team

Tags strings

11

1687

#### Problem 95. Given two arrays, find the maximum overlap

Created by: Cody Team

Tags matlab

22

1448

#### Problem 26. Determine if input is odd

Created by: Cody Team

119

22186

#### Problem 12. Fibonacci sequence

Created by: Cody Team

102

13137

#### Problem 79. DNA N-Gram Distribution

Created by: Cody Team

Tags matlab

7

1337

#### Problem 18. Bullseye Matrix

Created by: Cody Team

Tags matrices

96

5825

#### Problem 48. Making change

Created by: Cody Team

Tags money, subs

19

3335

#### Problem 21. Return the 3n+1 sequence for n

Created by: Cody Team

Tags 3n+1, sample

80

8186

#### Problem 60. The Goldbach Conjecture

Created by: Cody Team

Tags primes

57

5548

#### Problem 4. Make a checkerboard matrix

Created by: Cody Team

213

15580

#### Problem 50. QWERTY coordinates

Created by: Cody Team

Tags indexing

19

2236

#### Problem 71. Read a column of numbers and interpolate missing data

Created by: Cody Team

23

2260

#### Problem 70. Alphabetize by last name

Created by: Cody Team

Tags regexp, sorting

17

2224

#### Problem 66. Find the two-word state names

Created by: Cody Team

Tags regexp, states

6

1189

#### Problem 64. The Goldbach Conjecture, Part 2

Created by: Cody Team

Tags primes

17

2307

#### Problem 62. Elapsed Time

Created by: Cody Team

Tags time

18

2891

#### Problem 61. Find state names that end with the letter A

Created by: Cody Team

Tags regexp, states

10

1166

#### Problem 59. Pattern matching

Created by: Cody Team

Tags indexing

15

2697

#### Problem 58. Tic Tac Toe FTW

Created by: Cody Team

21

1738

#### Problem 57. Summing Digits within Text

Created by: Cody Team

Tags strings

13

2476

#### Problem 56. Scrabble Scores

Created by: Cody Team

10

2013

#### Problem 55. Counting Sequence

Created by: Cody Team

Tags encoding

27

1984

#### Problem 54. Maximum running product for a string of numbers

Created by: Cody Team

8

2136

#### Problem 53. Duplicates

Created by: Cody Team

7

2287

#### Problem 51. Find the two most distant points

Created by: Cody Team

Tags distance

12

2800

#### Problem 96. Knight's Tour Checker

Created by: Cody Team

Tags matlab, chess

24

1352

#### Problem 94. Target sorting

Created by: Cody Team

Tags sorting, matlab

30

4440

#### Problem 90. Connect Four Win Checker

Created by: Cody Team

Tags matlab, game

23

1245

#### Problem 89. Counting in Finnish

Created by: Cody Team

12

1505

#### Problem 86. Renaming a field in a structure array

Created by: Cody Team

Tags matlab

11

1502

#### Problem 84. Longest Divisor Run

Created by: Cody Team

Tags matlab

7

1282

#### Problem 82. Remove the small words from a list of words.

Created by: Cody Team

Tags matlab

10

1475

#### Problem 80. Test for balanced parentheses

Created by: Cody Team

Tags regexp, parens

9

1215

#### Problem 78. Implement a ROT13 cipher

Created by: Cody Team

12

1634

#### Problem 77. Clean the List of Names

Created by: Cody Team

Tags strings

5

1699

#### Problem 76. De-dupe

Created by: Cody Team

Tags matlab

14

2967

#### Problem 75. Find the palindrome

Created by: Cody Team

Tags strings

9

1570

#### Problem 74. Balanced number

Created by: Cody Team

Tags matlab

21

2945

#### Problem 73. Replace NaNs with the number that appears to its left in the row.

Created by: Cody Team

Tags matlab

18

2949

#### Problem 25. Remove any row in which a NaN appears

Created by: Cody Team

74

8528

#### Problem 24. Function Iterator

Created by: Cody Team

61

2095

#### Problem 22. Remove the vowels

Created by: Cody Team

Tags regexp, siam

30

6187

#### Problem 20. Summing digits

Created by: Cody Team

Tags strings, sum

36

7570

#### Problem 17. Find all elements less than 0 or greater than 10 and replace them with NaN

Created by: Cody Team

69

15433

#### Problem 16. Return the largest number that is adjacent to a zero

Created by: Cody Team

Tags vectors

28

5260

#### Problem 15. Find the longest sequence of 1's in a binary sequence.

Created by: Cody Team

74

6051

#### Problem 14. Find the numeric mean of the prime numbers in a matrix.

Created by: Cody Team

Tags easy, matrices

47

8824

#### Problem 13. Remove all the consonants

Created by: Cody Team

Tags regexp, basics

25

4028

#### Problem 9. Who Has the Most Change?

Created by: Cody Team

79

8790

#### Problem 3. Find the sum of all the numbers of the input vector

Created by: Cody Team

287

47429

#### Problem 2. Make the vector [1 2 3 4 5 6 7 8 9 10]

Created by: Cody Team

Tags basic, test, basics

208

47913

#### Problem 1. Times 2 - START HERE

Created by: Cody Team

Tags intro, math, easy

1509

96428

#### Problem 49. Sums with Excluded Digits

Created by: Cody Team

Tags strings

17

2216

#### Problem 47. Extract leading non-zero digit

Created by: Cody Team

7

2106

#### Problem 46. Which doors are open?

Created by: Cody Team

28

3254

#### Problem 45. Make a Palindrome Number

Created by: Cody Team

Tags strings

23

2318

#### Problem 44. Trimming Spaces

Created by: Cody Team

11

2382

#### Problem 43. Subset Sum

Created by: Cody Team

Tags matlab

29

1863

#### Problem 42. Find the alphabetic word product

Created by: Cody Team

Tags matlab

16

3288

#### Problem 41. Cell joiner

Created by: Cody Team

Tags strings, matlab

39

5823

#### Problem 40. Reverse Run-Length Encoder

Created by: Cody Team

Tags encoding

19

2544

#### Problem 39. Which values occur exactly three times?

Created by: Cody Team

Tags search

23

5042

#### Problem 37. Pascal's Triangle

Created by: Cody Team

26

4176

#### Problem 35. Quote Doubler

Created by: Cody Team

10

2883

#### Problem 34. Binary numbers

Created by: Cody Team

Tags matlab

48

4326

#### Problem 33. Create times-tables

Created by: Cody Team

Tags matrices

109

16392

#### Problem 32. Most nonzero elements in row

Created by: Cody Team

Tags matrices

39

7243

#### Problem 31. Remove all the words that end with "ain"

Created by: Cody Team

21

2212

#### Problem 30. Sort a list of complex numbers based on far they are from the origin.

Created by: Cody Team

28

5594

#### Problem 29. Nearest Numbers

Created by: Cody Team

43

4436

#### Problem 28. Counting Money

Created by: Cody Team

Tags regexp, strings

17

3617

#### Problem 27. Pangrams!

Created by: Cody Team

Tags strings

37

3781

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