Problem 1642. BULLSEYE Part 2: Reference Problem 18 BULLSEYE

Suman Saha

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Given n (always odd), return output a that has concentric rings of the 1s and 0s around the center point. Examples:

 Input  n = 3
 Output a is [ 1 1 1 
               1 0 1
               1 1 1 ]

 Input  n = 5
 Output a is [    1     1     1     1     1
                  1     0     0     0     1
                  1     0     1     0     1
                  1     0     0     0     1
                  1     1     1     1     1]

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Last Solution submitted on Jun 10, 2026

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2 Comments

goc3 on 12 Jul 2017

Additional test cases have been added.

Chris Cleveland on 13 Jul 2017

Goc3,

Do you know if Matrix Patterns II and Sequences & Series III will become badge eligible problem sets? Thanks!

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