D - Balanced Parenthesis Substrings

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A balanced parenthesis string is defined as follows: - The empty string is balanced. - If `P` is balanced, `(P)` is also balanced. - If `P` and `Q` are balanced, `PQ` is also balanced. `"()"`, `"(())()"` are examples of balanced parenthesis strings while `"(()"`, `"())"` are not balanced. A substring of a string is a contiguous subsection of the given string. Given $n$ and $k$, output a balance

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solution.cppC++17

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