If num$\_$bananas is less than $3,$ then output 'num$\_$bananas is less than the required amount to purchase.$\text{'}$

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

If total$\_$cost is less than or equal to dollar$\_$amount, then output 'Bananas successfully purchased.$\text{'}$

Otherwise, output 'Not enough money to buy all.$\text{'}$

If dollar$\_$amount is greater than or equal to $3,$ then output $\text{'}$At least one item was purchased.$\text{'}$

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num$\_$bananas $={\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}(input())$

dollar$\_$amount $=$ int input $()$