Debugging.. errors in Code coach

Question

I have been trying.. to solve the problems.. of code coach.. but.. many a times.. my code fails to pass the hidden test cases(I do not hard code) .Its like 75% cases pass.. but rest are rejected..
I am thinking.. about the root cause.. what I need to do to fix it?
So can anybody help me.. with this..?
Thank you

Answer 1

Yes.. that's what I am having problem with..

Answer 2

𝐊𝐢𝐢𝐛𝐨 𝐆𝐡𝐚𝐲𝐚𝐥 is it that.. I have not understood the problem well?