LeetCode刷題筆記(Evaluate Reverse Polish Notation)

剛剛又刷了一道題,感覺難度不是很大,下面就和大家分享一下經驗吧! 題目如下: Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are +, -, *, /. Each operand may be an integer or another expression.
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