I was wondering whether anyone could share his/her code on any problem in ejoi

I want code of the 1st with binary lifting and the 3rd mostly but any other is welcome!!!

Note:I was a participant 2 times in ejoi and personally this time (2020) i was around 200 score although i could have done better like 250 .i am saying cause some comments may say wrie ur own code but i did and it turned out not well.

Also i heard 1st could be done with persistent ST (some georgian girl did it)