Leetcode Problem 150. Evaluate Reverse Polish Notation

150. Evaluate Reverse Polish Notation

Leetcode Solutions

Evaluate Reverse Polish Notation using a Stack

  1. Initialize an empty stack.
  2. Iterate over each token in the input array.
  3. If the token is a number, push it onto the stack.
  4. If the token is an operator: a. Pop the top two numbers from the stack. b. Apply the operator to these two numbers. c. Push the result back onto the stack.
  5. After processing all tokens, the top of the stack will contain the final result.
  6. Pop and return the result from the stack.
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Evaluate Reverse Polish Notation by Reducing the List In-Place

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