1872.java

import java.io.IOException;
import java.util.Scanner;

public class Main {

    public static int inverso(int x)  {
        int y = 0;
        
        while (x!=0) {
            y = y*10 + x%10;
            x = x/10;
        }
        return y;
    }
    public static boolean palindrome(int x) {
        while(x%10 == 0) x/=10;
        return inverso(x) == x;
    }
    
    public static void main(String[] args) throws IOException {
 
        double R;
        int soma, inteiro, decimais;
        int C, casas, mult, j;
        Scanner leitor = new Scanner(System.in);
        
        C = leitor.nextInt();
        
        for (int i=0; i<C; i++) {
            R = leitor.nextDouble();
            
            inteiro = (int)R;
            //R = R - (int)R;
            
            mult = 1;
            while ( (R - (int)R) != 0 ){
                R = R*10;
                mult = mult*10;
            }
            decimais = (int)R - inteiro*mult;
            
            soma = inverso(inteiro) - decimais;
            if (soma >= 0)
              System.out.println(soma/(double)mult);
            else
              System.out.println(1./(double)mult);
        }
 
    }
 
}