Total Cars

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There are total $N$ cars in a sequence with $ith$ car being assigned with an alphabet equivalent to the $ith$ alphabet of string $S$ . Chef has been assigned a task to calculate the total number of cars with alphabet having a unique even value in the given range X to Y (both inclusive) . The value of an alphabet is simply its position in alphabetical order e.g.: a=1, b=2, c=3… The chef will

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solution.cppC++17

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