ЗОШ основание строки тесты

#include <iostream>
#include <cmath>
#include <vector>
#include <queue>
#include <algorithm>
#include <string>
#include <stack>
#include <set>
#include <map>
#define pii pair <int,int>
using namespace std;
using ll = long long;
using ld = long double;
using db = double;
void cv(vector <int> &v){
    for (auto x: v) cout<<x<<' ';
    cout<<"\n";
}

void cvl(vector <ll> &v){
    for (auto x: v) cout<<x<<' ';
    cout<<"\n";
}


void cvv(vector <vector <int> > &v){
    for (auto x: v) cv(x);
    cout<<"\n";
}

int main()
{
    ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	string S; cin>>S; int n = S.size();
	vector <int> P(n, 0);
	for (int i = 1; i < n;++i){
        int j = P[i-1];
        while (j > 0 && S[j] != S[i]){
            j = P[j-1];
        }
        if (S[i] == S[j]){
            j++;
        }
        P[i] = j;
	}
	cv(P);
	//cout<<count(P.begin(), P.end(), 0);
	//cout<<*upper_bound(P.begin(), P.end(), 0) - *lower_bound(P.begin(), P.end(), 0);
	/*int fr, to;
	for (int  i =0;i<n;++i){
        if (P[i] == 0){
            fr=i;
            break;
        }
	}
	for (int i = fr+1;i<n;++i){
        if (P[i]==0){
            to=i;
            break;
        }
	}

	cout<<to-fr+1;*/
}
/*
Контрпример:

abbbbbaaaa
6

aabbbbbaaaa

candalacadndala
7

kalkulkalkulkalkulkalka


lkulkalkulka

akkakakkakakka
*/