Write a C program with O (1) complexity that prints the f (n) value shown in the table below against the positive integer value of n entered from the keyboard. For example, when the user enters n = 8,...

Write a C program with O (1) complexity that prints the f (n) value shown in the table below against the positive integer value of n entered from the keyboard.

For example, when the user enters n = 8, only 4 should be printed on the screen.