I dont get it why we added n= n-1 command?

#1

in the first code of the online judge lecture -input and output I dont get why we added the n= n-1 command?
despite the fact that we mentioned everything required for the question

#2

Hey @priyrajraghav N variable is indicating number of test case that u want to handle.
Since after every iteration of while loop we will finish one test cases, thus we are decrementing 1 from N(indicating that we have finished one test case).

#3

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