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Imagine a sequence like this: a, b, c...z, aa, ab, ac...zz, aaa, aab, aac.... aax, aaz, aba, abc... (Its same as excel column names). Given an integer (n), generate n-th string from the above sequence. Ps: Don't generate the full list of sequence till n. It'll be definitely bad approach :)
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Software Development Engineer

Interviewed at Amazon

3.5★
Jul 31, 2012

Imagine a sequence like this: a, b, c...z, aa, ab, ac...zz, aaa, aab, aac.... aax, aaz, aba, abc... (Its same as excel column names). Given an integer (n), generate n-th string from the above sequence. Ps: Don't generate the full list of sequence till n. It'll be definitely bad approach :)

You are given a nxm matrix having unique integers, each column is sorted in ascending order. You have to select one integer from each column such that the difference between the minimum and maximum of the selected numbers becomes minimum.
avatar

Software Development Engineer

Interviewed at Amazon

3.5★
Sep 9, 2012

You are given a nxm matrix having unique integers, each column is sorted in ascending order. You have to select one integer from each column such that the difference between the minimum and maximum of the selected numbers becomes minimum.

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