题解 | 网购
网购
https://www.nowcoder.com/practice/5d7dfd405e5f4e4fbfdff6862c46b751
j,m,d,y=map(float,input().split())
if m==11:
if d==11:
if y==1:
j=j*0.7-50
else:
j=j*0.7
else:
if m==12:
if d==12:
if y==1:
j=j*0.8-50
else:
j=j*0.8
if j <= 0:
print('0.00')
else:
print(f'{j:.2f}')
