#include <stdio.h>
int main()
{
int x, y;
scanf("%d", &x);
if (x < 1)
{
y = x;
}
else if (x < 10)
{
y = 2 * x - 5;
}
else
{
y = 3 * x - 11;
}
printf("%d \n", y);
return 0;
}
#include <stdio.h>
int main()
{
double x;
scanf("%lf",&x);
if(x < 1)
y =x;
else if(x>=1 && x<10)
y = 2*x -5;
else
y = 3*x -11;
printf("%g",y);
return 0;
}