/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* 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
	{
 
        for (long a = 1; ; a *= 7) {
            long x = Double.valueOf(a).longValue();
            if (x != a) {
                System.out.println("Conversion fails at input=" + a + " output=" + x);
                break;
            }
        }
 
	}
}

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