[Python] 7 lines (simple!)
python\ndef numberOfRounds(self, startTime: str, finishTime: str) -> int:\n    s = int(startTime[:2]) * 60 + int(startTime[-2:])\n    t = int(finishTime[:2]) * 
```python\ndef numberOfRounds(self, startTime: str, finishTime: str) -> int:\n    s = int(startTime[:2]) * 60 + int(startTime[-2:])\n    t = int(finishTime[:2]) * 60 + int(finishTime[-2:])\n    if s > t:\n        t += 24 * 60\n    q, r = divmod(s, 15)\n    s, t = q + int(r > 0), t // 15\n    return max(0, t - s)\n```\nVote up if you find this helpful, thanks!
['Python']