Why this is showing error?

#1

Why this is showing error?

#2

hello @cbcao263
image
this is not correct declaration of vector of pair.
it should be vector< pair<int,int> > v;

#3


Why this is not giving correct ans?
Both Test Cases Wrong?

#4

use >= in line no 29.
image

#5

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.