Medium · Stacks & Queues
Prefix to postfix
Given a string exp holding a valid prefix expression whose operands are single characters and whose operators are the binary +, -, * and / (spaces may appear and are ignored), return the same expression in postfix form without spaces.
Examples
Example 1
{
"exp": "*-A/BC-DE"
}Output: ABC/-DE-*
Example 2
{
"exp": "+AB"
}Output: AB+
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