/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.time.*;
import java.time.format.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String dataMed = "2017-09-26 05:55:44.0";        
        DateTimeFormatter format = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.0");       
        LocalDateTime dataMed2 = LocalDateTime.parse(dataMed, format);
 
        if(dataMed2.getHour() < 6){
            System.out.println("Antes das 6 horas");
            System.out.println(dataMed2.minusDays(1));
        }else{
        	System.out.println(dataMed2);
        }
	}
}

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