题解 | #四则运算#
四则运算
http://www.nowcoder.com/practice/9999764a61484d819056f807d2a91f1e
#自测没通过，提交倒通过了
while True:
try:
s = input()
s.replace('[','(')
s.replace(']',')')
s.replace('}',')')
s.replace('{','(')
print(eval(s))
except:
break