Cod sursa(job #1804058)

Utilizator KemyKoTeo Virghi KemyKo Data 12 noiembrie 2016 10:30:25
Problema Prefix Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.75 kb
#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;

ifstream f("prefix.in");
ofstream g("prefix.out");

int urm[1000005],nr,m,n;
char s[1000005];

void prefix ()
{
    int i,k;
    k=0;
    urm[1]=0;
    for(i=2;i<=m;i++)
    {
        while(k>0 && s[k]!=s[i-1])
            k=urm[k];
        if(s[k]==s[i-1])
            k++;
        urm[i]=k;
    }
}

void kmp ()
{
    int i,k;
    for(i=m;i>=1;i--)
    {
        if(urm[i]!=0&&(i%(i-urm[i])==0))
        {
            g<<i<<'\n';
            break;
        }
        if(i==1)g<<0<<'\n';
    }
}

int main()
{
    int i;
    f>>n;

    for(i=1;i<=n;i++)
    {
        f>>s;
        m=strlen(s);
        prefix();
        kmp();
    }
}