Chef and Lottery Numbers

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Chef recently bought an online catering website. To increase his sales he decides to organize a lottery system, where you get one digit for every item you buy. A person's lottery number is formed by taking all the digits they received, in the order in which they were received. For example, if a person buys items A, B and C in that order, and gets digits 1, 5, and 7 respectively for these items, t

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solution.cppC++17

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