#include<stdio.h>
int main()
{
    float i;
    int n;
    float w,d;
    float b;
    scanf("%d",&i);
    scanf("%d",&n);
    Scanf("%d",&w);
    Scanf("%d",&d);
    scanf("%d"&b);
    b=i(+)
    printf("%.2f",&b);
    return 0;
    
}