题解 | #四则运算#
四则运算
https://www.nowcoder.com/practice/9999764a61484d819056f807d2a91f1e
str = input() str = str.replace('{','(') str = str.replace('}',')') str = str.replace('[','(') str = str.replace(']',')') result = int(eval(str)) print(result)
知识点:eval() 函数用来执行一个字符串表达式,并返回表达式的值