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The Matrix 2021

Start date: Jan. 30, 2021, 5 p.m. UTC Solution: HERE
Find the side length of the biggest black square in a matrix. In each column, black cells start at the bottom of the matrix and count up.

To kick off 2021 we present The Matrix Challenge!

The first 3 developers to solve the challenge perfectly in the least amount of time will be added to the Codility Hall of Fame, winning a package of swag and bragging rights. We’ll also be selecting 3 gold certificate winners randomly to win a package of swag.

Once the Matrix Challenge has ended (in two weeks), you will still be able to take the challenge, and gain certificates, but will no longer be in the running for prizes.

About Codility:

We help engineering leaders hire great software developers into their teams by evaluating technical skills in an unbiased way. We’re committed to levelling the playing field by building a platform that provides equal opportunity to all developers worldwide.

Good luck solving this Challenge!

Stats:

4458 started 998 silver awards 285 golden awards

Hall of fame:

1
Md Abedin
Time: 4 minutes
2
Peng Cao
Time: 6 minutes
3
Nafis Sadique
Time: 6 minutes