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Cod sursa(job #904802)
#include<fstream>
#include<algorithm>
#include<cstring>
using namespace std;
int i,j,n,lg[10000001],t,rez=0,nr;
char a[1000001];
void prefix()
{
int i,k=0;
lg[1]=0;
for(i=2;i<=n;++i)
{
while(k>0&&a[i]!=a[k+1])
k=lg[k];
if(a[i]==a[k+1])
++k;
lg[i]=k;
}
}
int main()
{
freopen("prefix.in","r",stdin);
ofstream g("prefix.out");
scanf("%d",&t);
while(t--)
{
scanf("%s",a+1);
n=strlen(a+1);
memset(lg,0,sizeof(lg));
prefix();
rez=0;
for(i=1;i<=n/2+1;++i)
{
nr=1;
j=i+i;
while(lg[j]==i*nr&&j<=n)
{
++nr;
j+=i;
rez=max(rez,i*nr);
}
}
g<<rez<<"\n";
}
return 0;
}