I will be adding some greedy approach based programs which will be fun to solve !!
https://practice.geeksforgeeks.org/problems/n-meetings-in-one-room-1587115620/1# ---> basic level problem.Can be considered as warm up problem !
https://practice.geeksforgeeks.org/problems/minimum-platforms-1587115620/1# ---> A medium level problem which is based on arrival and departure timings