#include <stdio.h>
int main() {
    double num=0;
    scanf("%lf", &num);
    int k,a, b, c, d;
    k = num * 10;
    d = k % 10;
    c = k / 10 % 10;
    b = k / 100 % 10;
    a = k / 1000;
    printf("%.3f", d+ c * 0.1+ b*0.01 + a * 0.001);
    return 0;

}