Category Discount

Read the price of a product and a category:

• 1 = student
• 2 = senior
• 3 = regular

Apply the corresponding discount:

• category 1 → 30%
• category 2 → 20%
• category 3 → 0%

Use nested if statements with conditions.

Input

Two integers separated by a space:

1. price
2. category

Output

Print the final price after the discount.

Example

Input:

10000 1

Output:

7000