Cod sursa(job #3277598)

Utilizator tudorhTudor Horobeanu tudorh Data 16 februarie 2025 20:08:00
Problema Prefix Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.98 kb
#include <bits/stdc++.h>

using namespace std;
ifstream fin("prefix.in");
ofstream fout("prefix.out");
int lps[1000001];
string s;
void tcase()
{
    fin>>s;
    int ssize=s.size();
    int len=0,ans=0;
    fill(lps,lps+ssize,0);
    for(int i=1;i<ssize;i++)
    {
        if(s[i]==s[len])
        {
            len++;
            lps[i]=len;
            if(i+1==lps[i]*2)
                ans=i+1;
        }
        else if(len)
        {
            len=lps[len-1];
            i--;
        }
    }
    string target;
    for(int i=0;i<ans/2;i++)
        target+=s[i];
    len=0;
    for(int i=ans;i<ssize;i++)
    {
        if(s[i]==target[len])
        {
            len++;
            if(len==target.size())
            {
                ans+=target.size();
                len=0;
            }
        }
        else break;
    }
    fout<<ans<<'\n';
}
int main()
{

    int tc;
    fin>>tc;
    while(tc--)
        tcase();
    return 0;
}