#include <iostream>

// if the parameter is outside [0,3] return -1,
// else return the inversion of the list formed
// by possible inputs
int func(int x)
{
    return (x<0)?-1:
            ((x>3)?-1:
            ((x==3)?0:
            ((x==2)?1:
            ((x==1)?2:3))));
}

int main() {
    std::cout << func(-1) << std::endl;
    std::cout << func(0) << std::endl;
    std::cout << func(1) << std::endl;
    std::cout << func(2) << std::endl;
    std::cout << func(3) << std::endl;
    std::cout << func(4) << std::endl;
    
    return 0;
}