Schrodinger Smiley

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*In the realm of emoticons, the Schrödinger smiley both smiles and frowns until its state is observed.* Given a string $S$ consisting only of `:`, `(`, and `)` (colon, left parenthesis, and right parenthesis). We define a Schrödinger's Smiley as any positive number of right parenthesis between two colons. For example, `:):`, `:))):`, and `:))))):` are Schrödinger's smileys while `:))(:`, `:(:`

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solution.cppC++17

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