# a = int(input())
# b = 0
# if a <= 500:
# b = a * 70 / 100
# elif 500 < a and a <= 1500:
# b = 350 + (a - 500) * 40 / 100
# elif 1500 < a and a <= 4500:
# b = 750 + (a - 1500) * 15 / 100
# elif 4500 < a and a <= 10000:
# b = 1200 + (a - 4500) * 5 / 100
# else :
# b = 1475 + (a - 10000) * 2 / 100
# print(int(b))
a = int(input())
if :