You're Given a String
题目描述
A. You're Given a String...
time limit per test
2 secondsmemory limit per test
256 megabytesinput
standard inputoutput
standard outputYou're given a string of lower-case Latin letters. Your task is to find the length of its longest substring that can be met in the string at least twice. These occurrences can overlap (see sample test 2).
Input
The first input line contains the string. It's guaranteed, that the string is non-empty, consists of lower-case Latin letters, and its length doesn't exceed 100.
Output
Output one number − length of the longest substring that can be met in the string at least twice.
Examples
Input
abcd
Output
0
Input
ababa
Output
3
Input
zzz
Output
2
题目来源：fps-www.educg.net-codeforce-1-2833.xml.zip；FPS 共享题包，题包内第 2309 题。保留原作者与原赛事署名。