Interview question: Give a rule to let the input number retrieve the finger

The question is similar: (because it was given orally, I understood it for a while)

There are the following rules: (the original question is that a series corresponds to five fingers)

X Y

0 1

1 2

2 3

3 4

4 5

5 4

6 3

7 2

8 1

9 2

10 3

11 4

12 5

13 4

14 3

......

 

Input an X at will and output a corresponding y

 

After analysis, I use the following method:

Find the rule Y every 8 groups, so we can make X to 8 get the remainder, and the remainder will be related to Y, as shown below:

Int Gety (const int X)

{

Int temp = x % 8; // 0, 1, 2, 3, 4, 5, 6, 7

If (temp> 4)

Return 8-Temp + 1;

Else

Return temp + 1;

}

 

Although this can be achieved, the Examiner requiresNo greater than judgmentI have been thinking about it for a long time and have not come up with a more sophisticated approach than "use". It is really depressing. Please kindly advise!