Explanation : Given, program is:
(while (r y){
}
If we want to final value as Then initial value of r should be equal to x (Since y is subtracted from r each time in given code). q incremented by 1 (q is quotient here). To avoid undefined behavior, value of y should be greater than zero.
Therefore, (q == 0)&&(r == x)&&(y > 0))