Issue with comparator function

#1

I tried to sort the pairs according to start time of the activity. Please let me know the issue with the comparator function.

Code Link: https://ide.codingblocks.com/s/576574

#2
  1. You have to declare a new vector for each test case.
  2. Sorting should be done according to end time.

Make these changes and let me know if you face any more issues.

#3

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