Evaluating Reverse Polish Notation, Sliding Window Maximum, and Top K Frequent Elements
Evaluating Reverse Polish Notation
Problem:
Given an array of strings tokens representing an arithmetic expression in Reverse Polish Notation, evaluate the expression and return the resulting integer value.
Constraints:
Valid operators are '+', '-', '*', and '/'.
Each operand can be an integer or another expression.
Division between two intege ...
Posted on Tue, 20 Oct 2026 16:30:31 +0000 by ozzmans