Hi Voile.
Thank you for your comments.
It was four years ago I forgot everything that I was doing there.
I will be grateful if you can explain me how and where you can see my solution code?

Hi Volie.
Why did you decide that I use parallelism?

LOL

O_O

40585

Please help, why this test failed:
Test #1, testing for:
chessBoard

1,1,1,1,1,1,1,1,1,1,1,1

1,1,1,1,1,1,0,1,1,1,1,1

1,1,1,1,1,1,1,1,0,1,1,1

1,1,1,1,1,1,1,1,1,1,1,0

1,1,1,1,1,1,1,1,1,0,1,1

1,1,1,1,1,1,1,1,1,1,1,1

1,1,1,1,1,1,1,1,1,1,1,1

1,1,1,1,1,1,1,1,1,1,1,1

1,1,1,1,1,1,1,1,1,1,1,1

1,1,1,1,1,1,1,1,1,1,1,1

1,1,1,1,1,1,1,1,1,1,1,1

1,1,1,1,1,1,1,1,1,1,1,0

Test Failed
Expected is <System.Collections.Generic.Dictionary2[System.Int32,System.Int32]> with 8 elements, actual is <System.Collections.Generic.Dictionary2[System.Int32,System.Int32]> with 7 elements

i receive 8 elements:

[0] {[2, 106]}

[1] {[3, 78]}

[2] {[4, 58]}

[3] {[5, 41]}

[4] {[6, 26]}

[5] {[7, 13]}

[6] {[8, 5]}

[7] {[9, 1]}