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Reverse Polish notation P52023
Evaluate arithmetic expressions given in the so-called reverse Polish notation. For instance, the expression
| 3 + 154 |
in reverse Polish notation is given as
| 3 154 + |
That is, the two operands are given first, and afterwards comes the corresponding operator. A more complicated expression like
| ((3 + 4) * (2 − 8)) + (2 + 5) |
is given as
| 3 4 + 2 8 − * 2 5 + + |
Input
Input consists of several arithmetic expressions in reverse Polish notation, one per line. The operands are natural numbers. The possible operators, all binary, are ‘+’, ‘-’, and ‘*’.
Output
For every expression, print the result of its evaluation.
Public test cases
Input
3 154 + 3 4 + 2 8 - * 2 5 + + 99
Output
157 -35 99
Information
- Author
- Salvador Roura
- Language
- English
- Translator
- Carlos Molina
- Original language
- Catalan
- Other languages
- Catalan
- Official solutions
- C++ Python
- User solutions
- C++ Haskell Python