3 test cases are not passing

#1
#2

Hi @abhi542136… Just go through my soln once… https://ide.codingblocks.com/s/594638
I have explained the whole thing using comments

#3

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#4

I have applied the same logic as told in the hint video… but why it is not passing all the test cases?? your code is right, but where is the mistake in my code??