Yalalovichik Strings

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To make Yalalovichik even more satisfied and happy, Jafar decided to invent Yalalovichik strings. A string is called a Yalalovichik string if the set of all of its distinct non-empty substrings is equal to the set of all of its distinct non-empty subsequences. You are given a string $S$. You need to find the number of its distinct non-empty substrings which are Yalalovichik strings. **Note:** A

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solution.cppC++17

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