Prime Usernames

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CodeChef decided to gift 'Prime Usernames' to the top performers of their March Long Contest 2020. But CodeChef's administrators have tons of other work to do, so they have asked you to find out if a given username is a Prime Username or not. A Prime Username is a username whose number of unique characters is a prime number. ###Input: - The first line of the input contains $N$ - the len

HINT LADDERno hints yet

L1 Observation

L2 Technique

L3 Approach

L4 Pseudo-code

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L5 Full solution

L5 unlocks only if you insist twice

solution.cppC++17

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