main()
{
float x,y
scanf("%f",&x)
if(x<0.0) y=0
else if(x>=0&&x<=15) y=4*x/3
else if(x>15) y=2.5*x-10.5
printf("%f\n",y)
}
#include <stdio.h>int main(void)
{
int looptimes, ri
double x, y
looptimes=GetInteger()
for(ri = 1ri <= looptimes ri++){
x=GetReal()
if ( x<0 )
y=0
else if( x<=15 )
y=4*x/3
else
y=2.5*x-10.5
printf("f(%.2f) = %.2f\n", x, y)
}
return 0
}
