Cod sursa(job #2791301)

Utilizator domistnSatnoianu Dominic Ioan domistn Data 30 octombrie 2021 12:45:23
Problema Prefix Scor 80
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.8 kb
#include <iostream>
#include <cstring>

using namespace std;

const int NMAX = 2000010;

short TESTS;
int sl, lps[NMAX + 1], ans[1010], ansl;
char s[NMAX + 1];

void generLps() {
    lps[0] = -1;
    for(int i = 0, j = -1; i < sl;) {
        while(j >= 0 && s[i] != s[j])
            j = lps[j];
        lps[++i] = ++j;
    }
}

int main()
{
    freopen("prefix.in", "r", stdin);
    freopen("prefix.out", "w", stdout);
    scanf("%hd", &TESTS);
    while(TESTS--) {
        scanf("%s", s);
        sl = strlen(s);
        generLps();

        int ans = 0;
        for(int i = 1; i <= sl; ++i) {
            int rep = i - lps[i];
            if(i % rep == 0 && rep != i) {
                ans = i;
            }
        }

        printf("%d\n", ans);
    }
    return 0;
}