1438: Palindrome Degree
Time Limit: 2 Sec Memory Limit: 256 MBSubmit: 0 Solved: 0
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Description
time limit per test
1 secondmemory limit per test
256 megabytesinput
standard inputoutput
standard outputString s of length n is called k-palindrome, if it is a palindrome itself, and its prefix and suffix of length 
are (k-1)-palindromes. By definition, any string (even empty) is 0-palindrome.
Let's call the palindrome degree of string s such a maximum number k, for which s is k-palindrome. For example, "abaaba" has degree equals to 3.
You are given a string. Your task is to find the sum of the palindrome degrees of all its prefixes.
Input
The first line of the input data contains a non-empty string, consisting of Latin letters and digits. The length of the string does not exceed 5·106. The string is case-sensitive.
Output
Output the only number − the sum of the polindrome degrees of all the string's prefixes.
Examples
Input
a2A
Output
1
Input
abacaba
Output
6