Clarification needed for employee's end time

Solution with end instead of start

Solution relies on fact that working times are sorted

My solution

Heap solution, why we need index of employee

The solution gives incorrect answer for [[[1, 3], [5, 7]], [[6, 8], [9, 11]]]

There is a way simpler solution. Create a list [True] * 24. Iterate through all ...

Solution gives incorrect answer. When employee working hours is, for example, [[...

The simple solution of sorting all employees' working hours in a list on start t...