/*
#include <stdio.h>
#include <math.h>
// intager
int main()
{
printf("Hello");
return 0;
}
*/
/*#include<stdio.h>
int main()
{
printf("Hello World");
return 0;
}*/
/*#include<stdio.h>
int main()
{
printf("Hello\nWorld");
return 0;
}
*/
/*#include<stdio.h>
int main()
{
printf("\'Hello\'");
return 0;
}*/
/*#include<stdio.h>
int main()
{
printf("\"Hello World\"");
}
*/
/*#include<stdio.h>
int main()
{
printf("\"!@#$%%^&*()\"");
return 0;
}
*/
/*
#include<stdio.h>
int main()
{
printf("\"C:\\Download\\hello.cpp\"");
return 0;
}
*/
/*
#include<stdio.h>
int main() {
int a, b;
scanf("%d %d", &a, &b);
printf("%d", a+b);
return 0;
}
*/
/*#include<stdio.h>
int main()
{
int n;
scanf("%d",&n);
printf("%d",n);
return 0;
}
*/
/*#include<stdio.h>
int main()
{
char x;
scanf("%c",&x);
printf("%c",x+1);
}
*/
/*#include<stdio.h>
int main()
{
float x;
scanf("%f",&x);
printf("%f",x);
return 0;
}
*/
/*#include<stdio.h>
int main()
{
int a,b;
scanf("%d %d",&a,&b);
printf("%d %d",a,b);
}
*/
/*#include<stdio.h>
int main()
{
char a,b;
scanf ("%c %c",&a,&b);
printf("%c %c",b,a);
}
*/
#include<stdio.h>
int main()
{
float a;
scanf("%f",&a);
printf("%.2f",a);
}