Challenge: Prefix to Postfix Conversion
Convert a prefix expression to a postfix expression.
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Problem statement
In this challenge, write a function postfix(prefix)
that takes a prefix expression as prefix
, converts it to a postfix expression using a stack, and then returns it.
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Prefix expression: An expression in which the operator appears before the operands.
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Postfix expression: An expression in which the operator appears after the operands.
For example, if we have an expression , then its prefix expression would be , and its postfix expression would be .
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