Convert Postfix Expression to Infix Description:

Convert Postfix expression to Infix using Stack Data Structure.

Hint: 1. Read the next symbol from the input while there are symbols left

2. If the symbol is an operand then push it to stack

3. Else the symbol is operator so, pop last 2 values from the stack, put the operator with the values as arguments and form a string. Push the resulted string back to stack.