题解 | #网购#
网购
https://www.nowcoder.com/practice/5d7dfd405e5f4e4fbfdff6862c46b751
price,month,day,ticket = map(float, input().split(' '))
if int(month)==11:
cost = price*0.7 - ticket*50
if cost<0:
cost = 0
print(f'{cost:.2f}')
else: #注：输入日期保证只有“双11”和“双12”。
cost = price*0.8 - ticket*50
if cost<0:
cost = 0
print(f'{cost:.2f}')
if int(month)==11:
cost = price*0.7 - ticket*50
if cost<0:
cost = 0
print(f'{cost:.2f}')
else: #注：输入日期保证只有“双11”和“双12”。
cost = price*0.8 - ticket*50
if cost<0:
cost = 0
print(f'{cost:.2f}')
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