Minimum Lexicographic Rotation Using Suffix Array

Question

    Consider a string of length n (1 <= n <= 100000). 
    Determine its minimum lexicographic rotation. 
    For example, the rotations of the string “alabala         


        

Answer 1

It seems that you should take first suffix in SA, which index is between 0 and length(S) - 1.

Some explanation: all rotations of S are in the beginning of S' suffixes from positions between 0 and length(S) - 1. Suffix array keeps suffixes in lexicographical order, so you just need to pick the first one which begins from rotation of S.