# Problems

1 – 19 of 19
 Problem Title Likes Solvers Difficulty

#### Problem 1321. Given a matrix, swap the 2nd & 3rd columns

Created by: Harish Maradana

Tags swap

10

1027

#### Problem 2178. Matrix multiplication across rows

Created by: Swapnali Gujar

4

311

#### Problem 2063. A matrix of extroverts

Created by: James

3

210

#### Problem 2701. Go to the head of the class!

Created by: James

2

120

#### Problem 1421. subtract central cross

Created by: Marco Castelli

Tags empty

6

483

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

Created by: James

3

122

#### Problem 1422. frame of the matrix

Created by: Marco Castelli

Tags frame

8

815

#### Problem 2351. Replace Nonzero Numbers with 1

Created by: Vishal

Tags matrix

6

369

#### Problem 42320. Write a function man that takes a row vector v and returns a matrix H as follows..

Created by: Manish Joshi

Tags easy, square, matrix

1

604

#### Problem 1853. Enlarge array

Created by: Matthew Eicholtz

5

241

#### Problem 1429. Remove entire row and column in the matrix containing the input values

Created by: Selvaraaju Murugesan

5

334

#### Problem 1898. Too Many Zeros, Dump Them!

Created by: Mineralter

5

225

#### Problem 42501. Toeplitize a matrix

Created by: Peng Liu

4

110

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

Created by: Matthew Eicholtz

3

102

#### Problem 2442. Magnet and Iron

Created by: rifat

6

105

#### Problem 3094. Hankelize a matrix

Created by: Peng Liu

5

123

#### Problem 1167. matrix zigzag

Created by: trekker

10

268

#### Problem 3075. Matrix of Multiplication Facts

Created by: James

13

106

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

Created by: Ned Gulley

Tags matrices

9

107

1 – 19 of 19