Largest Subsequence

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A string $S$ is called *good* if and only if : - The number of occurrences of "$\text{ab}$" as a substring of $S$ $=$ the number of occurrences of "$\text{ba}$" as a substring of $S$. For example, $\text{aaba}$, $\text{a}$ and $\text{babab}$ are good strings, while $\text{ab}$ is not. You are given a string $S$ consisting of characters $\text{a}$ and $\text{b}$ only. Find the length of the la

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solution.cppC++17

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