x = int(input("x="))
if x < 1600 : #如果x小于1600,y等于0
y = 0 #没有折扣
print("应付款:",x - (x * y))#y等于折扣价应该是总价格减去折扣金额
elif 1600 <= x < 2400:#
y = 0.05 #折扣5%
print("应付款:",x - (x * y))
elif 2400 <= x < 3200:
y=0.1 #折扣10%
print("应付款:", x - (x * y))
elif 3200 <= x < 6400:
y = 0.15 #折扣15%
print("应付款:", x - (x * y))
else: #这里表示x大于6400的金额
y = 0.2 #折扣是20%
print("应付款:", x - (x * y))