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PROGRAMMING CHALLENGES
Stack-Based Calculator
Difficulty:
3 Hard
2.3 Stacks
Topic:
Create a stack-based calculator that evaluates postfix expressions (e.g., "3 4 + 2 *"). The program should use a stack to store operands and apply operators. Implement this in pseudocode or Python.
Push operands onto the stack. When an operator is encountered, pop the necessary operands, perform the operation, and push the result back onto the stack.
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