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Find minimum integer such that any integer \in [1, n] can be constructed from its consequent subsums

For example, here's (SPOILERS) breakdown for $1143$, which is the solution for $n = 9$ $\underline{1}143$ $\underline{11}43$ $114\underline{3}$ $11\underline{4}3$ $1\underline{14}3$ $\underline{114}3$...
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