i've got it in my mind

For anybody who is struggling, the 1 in R1 goes in C11, knowing that it can be solved with logic.

Thank you for the hint.

Thanks for the hint Deathgrip. You've saved me once again!

Thanks.

One hint was all was needed. Thanks, Deathgrips!

Fully logical, but usage of temporaries was needed. (Since I did not use the hint.) Thank you! ^_^.