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Take an integer, sum the square of its digits, repeat on the result. Some numbers will converge on 1, others will converge on 89. Write an algorithm to give the count of numbers from 1 to 1000000 that converge on 89.
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Quantitative Software Engineer

Interviewed at Jump Trading

4.2
Nov 9, 2016

Take an integer, sum the square of its digits, repeat on the result. Some numbers will converge on 1, others will converge on 89. Write an algorithm to give the count of numbers from 1 to 1000000 that converge on 89.

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