Chef and Special Numbers

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Chef Hari is a little chef in Cheftown. One day, when Hari was enjoying the pleasant outside weather after finishing his Maths homework, his elder brother Shyam came and thought of testing Hari's Maths skills. Shyam described the concept of special numbers to Hari. Shyam will give Hari an integer K. A number N will be a special number if no substring of N is divisible by K. For example, if K = 7

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solution.cppC++17

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