num$\_$pears and my$\_$money are read from input. A pear costs $3$ dollars.

If num$\_$pears is less than $3,$ then output 'num$\_$pears requires at least $3$ to purchase.$\text{'}$

If num$\_$pears is greater than or equal to $3,$ then assign total$\_$cost with the product of num$\_$pears and $3.$

If total$\_$cost is less than or equal to my$\_$money, then output 'Successful purchase!$\text{'}$

Otherwise, output 'Need more money to purchase all.$\text{'}$

If num$\_$pears is greater than $31,$ then output 'Restocking soon.$\text{'}$