Problem 431. Sorting

Created by Yvan Lengwiler

Solve Later

Assume that x is an n-by-2 matrix. The aim is to return the first column of x, but sorted according to the second column.

Example:

 Input  = [1 2 3 4 5;
           4 3 1 2 2]'

 Output = [3 4 5 2 1]'

Solve

Solution Stats

524 Solutions
234 Solvers

Last Solution submitted on Mar 22, 2020

Last 200 Solutions

Problem Comments

2 Comments

2 Comments

Abdelhak ARESMOUK on 14 Dec 2012

Please! Can you explain more than that?

Jonathan Campelli on 19 May 2015

Aye! The first column is not "sorted according the second column" (only half an explanation). The block of numbers in each row is treated as a fixed unit, and each row is rearranged such that the values in the second column are sorted in ascending order.

Problem Recent Solvers234

Problem Tags

sorting

Problem 431. Sorting

Solution Stats

Last 200 Solutions

Problem Comments

Problem Recent Solvers234

Suggested Problems

More from this Author1

Problem Tags

Problem 431. Sorting

Solution Stats

Last 200 Solutions

Problem Comments

Problem Recent Solvers234

Suggested Problems

More from this Author1

Problem Tags

Players