sasd

#include <stdio.h>
#include <math.h>

int main()
{
double x;
scanf("%f", &x);
const double a = 3,b = 6;
switch(x)
{
    case 1: {f1(x)<a;
    break;}
    case 2: {f1(x)>a && f1(x)<b;
    break;}
    case 3: {f1(x)>b;
    break ;}
}
}