import java.util.*;
import java.lang.*;
import java.math.*;
import java.text.*;

class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		DecimalFormat df = new DecimalFormat("0.0000E0");

		Double valorDouble =  12345.0;
		System.out.println(df.format(valorDouble));
	}
}