Your question is Count Repeated Numbers in a Range. Start with the requirements on the right.
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For an EPAM Systems QA validation utility, implement a function that counts how many times the digit 8 appears when writing every integer in an inclusive range from start to end. Count repeated occurrences within the same number separately. For example, 88 contributes two occurrences.
Your solution must avoid enumerating every number in the range. Use positional digit counting so that the algorithm remains efficient when the range contains very large values.
Implement count_eights(start, end).
start and end, where start <= end.8 occurrences in all numbers from start through end, inclusive.def count_eights(start, end):