/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
import java.time.* ;
import java.time.format.* ;
import java.time.temporal.* ;
import java.time.chrono.* ;
import java.time.zone.* ;
 
 
/* 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 input = "20100101120000000";
		DateTimeFormatter f = DateTimeFormatter.ofPattern( "uuuuMMddHHmmssSSS" ) ;
		LocalDateTime ldt = LocalDateTime.parse( input , f ) ;
 
		ZoneId z = ZoneId.of( "America/Montreal" ) ;
		ZonedDateTime zdt = ldt.atZone( z ) ;
 
		LocalDate ld = zdt.toLocalDate() ;
		ZonedDateTime zdtStartOfDay = ld.atStartOfDay( z ) ;
 
		Duration d = Duration.between(
		    zdtStartOfDay.toInstant() ,
		    zdt.toInstant() 
		);
		long millis = d.toMillis() ; 
 
		System.out.println( "d.toString(): " + d ) ;
		System.out.println( "millis: " + millis ) ;
	}
}

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