题解 | #四则运算#
四则运算
https://www.nowcoder.com/practice/9999764a61484d819056f807d2a91f1e
s=input()
for i in range(len(s)):
if s[i]=="{" or s[i]=="[":
s=s[:i]+"("+s[i+1:]
elif s[i]=="}" or s[i]=="]":
s=s[:i]+")"+s[i+1:]
print(int(eval(s)))
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