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CodeChefRating 1970Open on judge ↗

You are given a string $S$ of lowercase English letters with length $N$. You are allowed to (but don't have to) choose one index in this string and change the letter at this index to any other lowercase English letter. The cost of this operation is the absolute value of the difference of ASCII values of the new letter and the original letter; let's denote it by $X$. Next, consider the number of p

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solution.cppC++17

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