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

Medium6/2/2024

Given an expression in Reverse Polish Notation (postfix), evaluate the value of the expression. In Reverse Polish Notation, the operators follow their operands. For example, the expression `3 10 5 + *`

is equivalent to `3 * (10 + 5)`

.

The expression is given as an array either integers or operators. So, for the expression `[3, 10, 5, '+', '*']`

you should return `45`

.

The result should be rounded to the nearest integer.

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