Cod sursa(job #2500389)

Utilizator cyg_contnr1Rares Burghelea cyg_contnr1 Data 27 noiembrie 2019 20:03:08
Problema Prefix Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.6 kb
#include <fstream>
using namespace std;
char v[1000001];
int prefix[1000001];
int main()
{
    ifstream cin("prefix.in");
    ofstream cout("prefix.out");
    int t,i,j,k;
    cin>>t>>ws;
    for(i=0;i<t;i++)
    {
        cin.getline(v+1,1000001);
        prefix[1]=0; k=0;
        for(j=2;v[j];++j)
        {
            while(k>0 && v[j]!=v[k+1])
                k=prefix[k];
            if(v[j]==v[k+1])
                ++k;
            prefix[j]=k;
        }
        j--;
        while(j>0&&!(prefix[j]!=0&&j%(j-prefix[j])==0))--j;
        cout<<j<<endl;
    }
    return 0;
}