import java.util.Scanner;
class Z_Pra_1_3 {
public static void main(String[] args) {
double n;
Scanner input = new Scanner(System.in);
n = input.nextDouble();
input.close();
printOut(n, 12);
}
public static void printOut(double n, int a) {
if (n < 0) {
n = -n;
System.out.print('-');
}
long before = (long) n;
double after = n % 1;
printOutLong(before);
System.out.print('.');
printDouble(after, a);
}
public static void printDouble(double n, int a) {
if (a == 0) {
printOutLong((long) n);
} else {
n *= 10;
if ((long) n == 0)
System.out.print(0);
printDouble(n, a - 1);
}
}
public static void printOutLong(long n) {
if (n >= 10) {
printOutLong(n / 10);
}
System.out.print(n % 10);
}
}