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A Hippo got an opportunity for internship at Macrosofty. Interviewer gave him a problem which is stated as follows : Given a string find the number of distinct characters. As Hippo doesn't like programming help him to get selected. ###Input: - A string consisting of lower case letters only ###Output: Required output. ###Constraints $1 \leq len(string) \leq 100000$ ###Samp

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solution.cppC++17

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