Java Super simple sol
\nclass Solution {\n    public int numberOfRounds(String startTime, String finishTime) {\n        int start = timeInMinute(startTime); //convert start time to m
```\nclass Solution {\n    public int numberOfRounds(String startTime, String finishTime) {\n        int start = timeInMinute(startTime); //convert start time to minutes\n        int end = timeInMinute(finishTime); //Convert end time to minutes\n        \n        if(end < start)\n            end += 24*60;\n        \n        if(start % 15 != 0)\n            start += 15 - (start % 15); // make the starting point from the multiple of 15\n        \n        if(end % 15 != 0)\n            end -= end % 15; // make the ending point multiple of 15\n        \n        if(end < start)\n            return 0;\n        \n        return (end-start)/15;\n        \n    }\n    \n    private int timeInMinute(String s){\n        int h = Integer.parseInt(s.substring(0,2));\n        int m = Integer.parseInt(s.substring(3));\n        \n        return (h*60)+m;\n    }\n}\n```
['Java']