We have a logical array (with ones and zeroes). It is simple: after processing every column may only contain a single true value, or none at all. Not on any row, but only the uppermost occurrence in the input array, if any.

For example:

 [ 0 0 1 1
   0 1 0 1
   0 0 1 1 ] 
becomes 
 [ 0 0 1 1
   0 1 0 0
   0 0 0 0 ]

And of course, your solution should be the most innovative, shortest and most elegant one.

Solve

Solution Stats

63 Solutions

34 Solvers

Last Solution submitted on Nov 04, 2025

Last 200 Solutions

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers34

George Berken minnolina Pauli Huusari Riccardo G.

Suggested Problems

More from this Author31

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!