package hackerrank;

public class TimeConversion {

static String timeConversion(String s) {

int timeInt = Integer.parseInt(s.substring(0, 2));

String format = s.substring(s.length()-2);

if(timeInt == 12 && format.equals("AM")){

timeInt = 0;

}else if(timeInt != 12 &&format.equals("PM")){

timeInt += 12;

}

String timeString = String.valueOf(timeInt).length() == 1 ? "0"+timeInt : String.valueOf(timeInt);

return timeString + s.substring(2,s.length()-2);

}

public static void main(String[] args) {

System.out.println(timeConversion("07:05:45PM")+", ans: 19:05:45");

System.out.println(timeConversion("12:01:00PM")+", ans: 12:01:00");

System.out.println(timeConversion("12:01:00AM")+", ans: 00:01:00");

}

}