P8032 [COCI 2015/2016 #7] Nizovi

Arrays in a programming language are defined as follows: - The beginning and end of an array are marked with curly braces ($\texttt \{$ and $\texttt \}$), respectively. - Inside each pair of braces, there are several (**possibly $0$**) comma-separated **elements** (there is no comma after the last element of each array). - Each element can be either a **word** (a string consisting of lowercase letters) or another array. - Some valid arrays are: $\texttt {\{\}}, \texttt{\{a,b,c\}}, \texttt{\{abc,znj,\{novi,niz\},pozz\}}$. You need to apply the following formatting style to make the program look nicer: - Start a new line whenever you encounter a word or a curly brace. - A comma should be placed directly after an array element. - Every time you encounter a $\texttt{\{}$, increase the indentation by $2$ spaces. - Every time you encounter a $\texttt{\}}$, decrease the indentation by $2$ spaces. Given an array, output it in the above formatting style.

A string $S$ representing the given array.

The array formatted in the required style.

**Constraints** - For $50\%$ of the testdata, elements contain only words. - For $100\%$ of the testdata, $1 \le |S| \le 1500$. **Hints and Notes** The checker is from the [Testlib library](https://github.com/MikeMirzayanov/testlib/blob/master/checkers/fcmp.cpp), see the attachment. **Translated from [COCI 2015-2016](https://hsin.hr/coci/archive/2015_2016/) [#7](https://hsin.hr/coci/archive/2015_2016/contest7_tasks.pdf) _Task 1 Nizovi_.** **The score for this problem follows the original COCI settings, with a full score of $50$.** Translated by ChatGPT 5