Substraction

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Little chef is learning how to decrease a number by one, but he does it wrong with a number consisting of two or more digits. Chef subtracts one from a number by the following algorithm: if the last digit of the number is non-zero, he decreases the number by one. if the last digit of the number is zero, he divides the number by 10 (i.e. removes the last digit). You are given an integer number n

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solution.cppC++17

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