Given a set of activities with specific time period,this algorithm finds the maximum activities that can be performed in that specific time period
| Activity # | Start | Finish |
|---|---|---|
| 1 | 18 | 20 |
| 2 | 19 | 20 |
| 3 | 20 | 21 |
| 4 | 22 | 23 |
| 5 | 18 | 19 |
| 6 | 19 | 23 |
Maximum Number of Activities : 3 at time 19-20