Cod sursa(job #927393)

Utilizator PatrikStepan Patrik Patrik Data 25 martie 2013 19:38:16
Problema Prefix Scor 80
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.87 kb
    #include<cstdio>
    using namespace std;
    #define MAX 1000005
    int T , pi[MAX] , q , best[MAX];
    char s[MAX];
    bool ok[MAX];

    int main()
    {
        freopen("prefix.in" , "r" , stdin );
        freopen("prefix.out" , "w" , stdout);
        scanf("%d" , &T);
        for(int i = 1 ; i <= T ; ++i )
        {
            scanf("%s" , s+1);
            pi[0] = pi[1] = 0;
            q = 0;
            for(int i = 2 ; s[i] ; ++i )
            {
                while(s[i]!=s[q+1] && q)
                    q = pi[q];
                if(s[i] == s[q+1])
                    q++;
                pi[i] = q;
            }
            int maxx = 0;
            for(int i = 1 ; s[i] ; ++i )
                if(pi[i] && pi[i]%(i-pi[i])==0)
                    maxx = i;
            printf("%d\n" , maxx );
        }
        return 0;
    }