题解 | #四则运算#
四则运算
http://www.nowcoder.com/practice/9999764a61484d819056f807d2a91f1e
s = input()
a = ""
for l in s:
if l == "{"&nbs***bsp;l == "[":
a +="("
continue
if l == "}"&nbs***bsp;l == "]":
a +=")"
continue
else:
a +=l
print(int(eval(a)))