//lab6_1.c
#include <stdio.h>
void main() {
float x,y,z;
int a,b=0,m,n;
scanf("%f",&x);
y= x - (int) x; // y is the fraction
a=(int) x;
while (a > 0) {
    b=b*10 + (a % 10);
        a=a/10;
    }
    z=y+b;
    printf("%f\n",z);
}