def calculate_cart_total(prices, discount_percent):
    
    total = sum(prices)
    
    discount_amount = total * (discount_percent / 100)
    
    final_total = total - discount_amount
    
    return round(final_total, 2)

print("Enter the prices of items in the cart (comma separated):")
nums = input().split(",")
prices = [float(prices) for prices in nums]

print("Enter the discount percentage:")
discount = int(input())
print(calculate_cart_total(prices, discount))