Cod sursa(job #1333934)

Utilizator rsteliRadu Stelian rsteli Data 3 februarie 2015 18:50:03
Problema Prefix Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.67 kb
#include <fstream>
using namespace std;
ifstream cin("prefix.in");
ofstream cout("prefix.out");

int n,p[1000001],len,ind,lenp,a;
char s[1000001];
int main()
{
    int i,j,t;
    cin>>n;
    for(t=1;t<=n;t++)
    {
        cin>>s+1;
        p[1]=0;
        for(len=1;s[len];len++);
        j=0;
        for(i=2;i<=len;i++)
        {
            while(j && s[j+1]!=s[i])
            j=p[j];
            if(s[j+1]==s[i])
                j++;
            p[i]=j;
        }
        a=0;
        for(i=len;i>1;i--)
            if(p[i] && i%(i-p[i])==0)
            {
                a=i;
                break;
            }
        cout<<a<<'\n';
    }
}