digit-sum-via-str-conversion

Status: IN

`countBalls` computes digit sums by casting to string and summing character values (`sum(int(d) for d in str(i))`), not by arithmetic divmod.

Source: entries/2026/06/06/maximum-number-of-balls-in-a-box-solution.md

Depended on by

• string-over-arithmetic-for-digit-ops

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