/* 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 int digital_root (int n) {
return ( n != 0 && n%9 == 0) ? 9 : n % 9;
}
{
// your code goes here
System.
out.
println(digital_root
(255)); }
}
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