http://mirror.codeforces.com/problemset/problem/182/D

this problem is tagged with hashing but i couldnt find any tutorial for it. can you please give me an idea for solving it by use of hashing? thanks.

hey can you please list some easy string problems where we have to hash the strings and then use binary search on it. please give links to your solutions also because i am not able to implement it. thanks.