Codeforces Beta Round #7, problem: (D) Palindrome Degree#includeiostream#includecstdio#include
Codeforces Beta Round #7, problem: (D) Palindrome Degree
#include<iostream>#include<cstdio>#include<cstdlib>#include<cstring>__int64 dp[5000000+5];char s[5000000+5];using namespace std;int main(void){ __int64 ans=0,l=0,r=0,k=1; scanf("%s",s); for(int i=0;s[i];i++) { l=l*33+s[i]-'a'; r=r+(s[i]-'a')*k; k=k*33; if(l==r) dp[i+1]=dp[(i+1)/2]+1; ans+=dp[i+1]; } cout<<ans<<endl; return 0;}