Error in rain trapping problem

#1

my code seems perfect but it shows error in compilation without teliing cause

#2

@Shashank-Shekhar-2351214838461151 send me your code i will check it.

#3

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.