Given integers n and k such that
0 < n <= 10^6
0 < k <= 10^3
and a string S of length n.
Find any substring of length k in S with maximum number of occurrences. I don't care about the obvious complete search solution. Also, no need for complete solution. just some hints. what topic to look for ?etc.
example
n=13 k=3
abcabcabcabcd
ans is "abc" repeated 4 times.