Cod sursa(job #2123028)

Utilizator albucristianAlbu Cristian-Gabriel albucristian Data 5 februarie 2018 18:39:26
Problema Prefix Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.72 kb
#include <fstream>
#include <cstring>
using namespace std;
char a[2000002];
int pi[2000002];
int main()
{
    int n,m,i,j,nr,k,t;
    ifstream in("prefix.in");
    ofstream out("prefix.out");
    in>>t;
    for(j=1;j<=t;j++)
    {
        in>>a+1;
        n=strlen(a+1);
        nr=0;
        k=0;
        pi[1]=0;
        for(i=2;i<=n;i++)
        {
            while(k>0&&a[i]!=a[k+1])
            {
                k=pi[k];
            }
            if(a[k+1]==a[i])
            {
                k++;
            }
            pi[i]=k;
        }
        for(i=n;i>0;i--)
        {
            if(i%(i-pi[i])==0&&pi[i]>0)
                break;
        }
        out<<i<<"\n";
    }
    return 0;
}