python 3 solution
\ndef numberOfRounds(self, startTime: str, finishTime: str) -> int:\n\tstartTime = int(startTime[:2])*60+int(startTime[3:])\n\tfinishTime = int(finishTime[:2])*
```\ndef numberOfRounds(self, startTime: str, finishTime: str) -> int:\n\tstartTime = int(startTime[:2])*60+int(startTime[3:])\n\tfinishTime = int(finishTime[:2])*60+int(finishTime[3:])\n\n\tstart, finish = math.ceil(startTime/15)*15, math.floor(finishTime/15)*15\n\n\tif finishTime>=startTime:\n\t\tplayed = (finish-start)//15\n\t\treturn max(0, played)\n\treturn (1440-start+finish)//15\n```
['Python3']