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Cod sursa(job #312599)
#include <fstream.h>
#include <string.h>
#define MaxN 1000009
ifstream fin("prefix.in");
ofstream fout("prefix.out");
int n,pi[MaxN],T;
char s[MaxN];
void trans()
{
int i;
n++;
for(i=n;i>=1;i--)
s[i]=s[i-1];
s[0]=' ';
}
void prefix()
{
int i,k=0,x=0;
pi[1]=0;
for(i=2;i<=n;i++)
{
while(k && s[k+1]!=s[i])
k=pi[k];
if(s[k+1]==s[i])
k++;
pi[i]=k;
if(k && i%(i-k)==0)
x=i;
}
fout<<x<<'\n';
}
void gol()
{
int i;
for(i=1;i<=n;i++)
{
pi[i]=0;
s[i]='\n';
}
}
int main()
{
fin>>T; fin.get();
for(int i=1;i<=T;i++)
{
fin.get(s,MaxN,'\n');
fin.get();
n=strlen(s);
trans();
prefix();
gol();
}
fin.close();
fout.close();
return 0;
}