Happy / Sad Number Calculation

Positive Integer =
   
Result =

A happy number is a positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1, when this process do not end in 1 are unhappy numbers (or sad numbers), ends in 1 are happy numbers.

For example, Positive Integer = 103, Sum of Digits of 103 = 1² + 0² + 3² = 1 + 0 + 9 = 10
      10 = 1² + 0² = 1 + 0 = 1, So 103 is a happy number.

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