Reverse Polish Notation Calculator

MIDDLE

CiklumN-iX

Evaluate the value of an arithmetic expression in Reverse Polish Notation.

Valid operators are +, -, *, and /. Each operand may be an integer or another expression.

Division should truncate toward zero.

Example:

Input: tokens = ["2", "1", "+", "3", "*"]
Output: 9
Explanation: ((2 + 1) * 3) = 9

Input 1:{"tokens":["2","1","+","3","*"]}

Output 1:9

Input 2:{"tokens":["4","13","5","/","+"]}

Output 2:6

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