Editorial for DMOPC '15 Contest 5 P3 - All Your Base

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Iterate up from A_{N-1}, converting A_{i-1} in base A_i. A language's built-in integer parsing function generally takes a second parameter denoting the base (parseInt in Java, int in Python, etc.) Notice that the bounds allow for base 1, in which case builtins will generally fail, so simply have a manual check for base 1.

Time Complexity: \mathcal{O}(N)


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