Lucky Roll Number

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Chef performs the following operation on the roll numbers: * Starting with any positive integer, replace the number with the sum of the squares of its digits. * Repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. According to Chef, a roll number is lucky only if it ends with $1$ in the above process. Help Chef to find if t

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solution.cppC++17

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