#include <stdio.h>
float x = 4.5;

float f (float a)

{
    a+=1.3;
    x-=4.5;
    return(a+x);
}
int main(void) {
	// your code goes here
 float y;
 
    x*=2.0;
    y=f(x);
    printf("\n%f%f",x,y);
	return 0;
}