How to solve RabbitAndTable from TCO 17 finals?

Hi,
How to solve Quadruple Counting . I read the editorial but couldn't understand . Any help will be appreciated. Thanks

Hi Everyone, This problem is Julia and operational Summation I am not able to get editorial's approach . Could anyone help me , how to solve it. Thanks

Hi, This problem is Endless spin. Can anyone tell me how to solve it? Thank you.

Hi , This problem is from codechef(Jan cook off 2017) : Xor Grid I read the editorial of the same,but didn't get that.Where did (2^62-2^k+1,2^k) come from? Is their any problem similar to this ? Help me... Have a nice day..