Hello guys !!!

And I am unable to solve these 15 problems even after trying very much and I thought that I shouldn’t drag ZIO for really long time so I am asking you guys for help

Here are the 15 problems which I couldnt solve :

Pls help me!

ZIO 2006 , P3 :

link : https://www.iarcs.org.in/inoi/2006/zio2006/zio2006-qpaper.pdf

Saw a solution but didnt understand

link of the solution : https://www.iarcs.org.in/inoi/online-study-material/topics/dp-tiling.php

Better explanation : https://journeywithdp.blogspot.com/2018/07/way-to-solve-tiling-problems.html

Credit : @denjell

ZIO 2009 , P1:

link : https://www.iarcs.org.in/inoi/2009/zio2009/zio2009-qpaper.pdf

very similar to the last problem

Credit : @denjell

ZIO 2011 , P4 :

link : https://www.iarcs.org.in/inoi/2011/zio2011/zio2011-qpaper.pdf

Solution : https://en.wikipedia.org/wiki/Burrows–Wheeler_transform

ZIO 2002 , P3 :

link:https://www.iarcs.org.in/inoi/2002/zio2002/part-a-qpaper.pdf

solution which I didnt understand : https://www.iarcs.org.in/inoi/2002/zio2002/part-a-solutions.txt

Credit : @aryan12

ZIO 2012 , P4 :

link : https://www.iarcs.org.in/inoi/2012/zio2012/zio2012-qpaper.pdf

Credit : @bharat8i

ZIO 2014 , P4 :

link : https://www.iarcs.org.in/inoi/2014/zio2014/zio2014-qpaper.pdf

ZIO 2017 , P3 , PART C :

link : https://www.iarcs.org.in/inoi/2017/zio2017/zio2017-question-paper.pdf

Credit : @aryan12

ZIO 2017 , P4 :

link : https://www.iarcs.org.in/inoi/2017/zio2017/zio2017-question-paper.pdf

ZIO 2015 , P2 :

link : https://www.iarcs.org.in/inoi/2015/zio2015/zio2015-question-paper.pdf

solution : https://www.iarcs.org.in/inoi/2015/zio2015/zio2015-question-paper.pdf

Credit : @swetanjal

ZIO 2016 , P2 :

link : https://www.iarcs.org.in/inoi/2016/zio2016/zio2016-question-paper.pdf

Credit : @druh @Whiplash99

ZIO 2007 , P1 :

link : https://www.iarcs.org.in/inoi/2007/zio2007/zio2007-qpaper.pdf

Credit : @g_ajeet_11000

ZIO 2007 , P3 :

link : https://www.iarcs.org.in/inoi/2007/zio2007/zio2007-qpaper.pdf

taking average is not working

Credit : @cdsnehit

ZIO 2008 , P1 :

link : https://www.iarcs.org.in/inoi/2008/zio2008/zio2008-qpaper.pdf

Credit : @denjell

ZIO 2004 , P4 :

link : https://www.iarcs.org.in/inoi/2004/zio2004/zio2004-qpaper.pdf

Credit : @g_ajeet_11000

ZIO 2004 , P3 :

link : https://www.iarcs.org.in/inoi/2004/zio2004/zio2004-qpaper.pdf

Credit : @g_ajeet_11000

ZIO 2004 , P5 :

link : https://www.iarcs.org.in/inoi/2004/zio2004/zio2004-qpaper.pdf

Credit : @g_ajeet_11000

Pls help me if you know solutions of any of these problems

Thanks

Sudheera Y S