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Cod sursa(job #108267)
using namespace std;
#include <stdio.h>
#include <string.h>
#include <vector>
#define Lmax 10000002
#define Lcmax 22
#define Dim 4194303
char s[Lmax],c[Lcmax];
vector<int> h[Dim+1];
vector<int>::iterator it,it2;
int L,Lc,tot,i;
long long nr,Nrmax;
int main()
{
freopen("abc2.in","r",stdin);
freopen("abc2.out","w",stdout);
scanf("%s\n",&s);
L=strlen(s);
scanf("%s\n",&c);
Lc=strlen(c);
//pt fiecare cuvant hashing
for (i=0,nr=0;i<Lc;++i)
nr=(nr*4)+c[i]-'a';
h[nr & Dim].push_back(nr>>20);
while (! feof(stdin))
{
scanf("%s\n",c);
for (i=0,nr=0;i<Lc;++i)
nr=(nr*4)+c[i]-'a';
h[nr & Dim].push_back(nr>>20);
}
//pt fiecare pozitie cauta in hash
Nrmax=(1<<Lc);
Nrmax=Nrmax*Nrmax-1;
for (i=0,nr=0;i<Lc;++i)
nr=(nr*4)+s[i]-'a';
it=h[nr & Dim].begin();
while (it<h[nr & Dim].end())
{
if (*it==nr>>20)
{
++tot;
break;
}
++it;
}
for (i=1;i<=L-Lc;++i)
{
nr=((nr*4)&Nrmax)+s[i+Lc-1]-'a';
it=h[nr & Dim].begin();
while (it<h[nr & Dim].end())
{
if (*it==nr>>20)
{
++tot;
break;
}
++it;
}
}
printf("%d",tot);
fclose(stdin);
fclose(stdout);
return 0;
}