http://lightoj.com/volume_showproblem.php?problem=1255
/*0.068s,7548KB*/
#include<bits/stdc++.h>
using namespace std;
const int mx = 1000005;
char t[mx], p[mx];
int f[mx];
void getfail()
{
f[0] = f[1] = 0;
for (int i = 1; p[i]; ++i)
{
int j = f[i];
while (j && p[i] != p[j]) j = f[j];
f[i + 1] = (p[i] == p[j] ? j + 1 : 0);
}
}
int find()
{
int m = strlen(p), cnt = 0;
getfail();
int j = 0;
for (int i = 0; t[i]; ++i)
{
while (j && p[j] != t[i]) j = f[j];
if (p[j] == t[i]) ++j;
if (j == m) ++cnt;
}
return cnt;
}
int main()
{
int tt;
scanf("%d", &tt);
getchar();
for (int cas = 1; cas <= tt; ++cas)
{
gets(t), gets(p);
printf("Case %d: %d\n", cas, find());
}
return 0;
}