Cod sursa(job #953959)

Utilizator gbi250Gabriela Moldovan gbi250 Data 27 mai 2013 21:13:20
Problema Prefix Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.67 kb
#include <fstream>
#include <cstring>
#define size 1000001
using namespace std;
char s[size];
int n, i, m, j, x, pi[size], nr;
ifstream fin("prefix.in");
ofstream fout("prefix.out");
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
    {
        fin>>s+1;
        m=strlen(s+1);
        x=0; pi[1]=pi[0]=0;
        for(j=2;j<=m;j++)
        {
            while(s[j]!=s[x+1]&&x>0)
                x=pi[x];
            if(s[j]==s[x+1])
                x++;
            pi[j]=x;
        }
        for(j=m;j>=2;j--)
            if(pi[j] && j%(j-pi[j])==0)
            {
                nr=j;
                break;
            }
        fout<<nr<<'\n';
        nr=0;
    }
    return 0;
}