OJ-Problems-Source/HDOJ/1686_autoAC.cpp

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#include <stdio.h>
#include <string.h>
#define MAX 10000
int next[MAX + 1];
char pattern[MAX + 1];
int init_next (char *pattern, int *next);
int KMP (char text, char *pattern, int len);
int main()
{
int T;
int len;
char text = '\0';
scanf ("%d", &T);
getchar ();
while (T --)
{
len = init_next (pattern, next);
printf ("%d\n", KMP (text, pattern, len));
}
return 0;
}
int init_next (char *pattern, int *next)
{
int q, i = 0;
q = next[0] = -1;
pattern[i ++] = getchar ();
while ((pattern[i] = getchar ()) != '\n')
{
while (q >= 0 && pattern[q + 1] != pattern[i])
{
q = next[q];
}
if (pattern[q + 1] == pattern[i])
{
q ++;
}
next[i] = q;
i ++;
}
return i;
}
int KMP (char text, char *pattern, int len)
{
int q, i = 0;
int count = 0;
q = -1;
while ((text = getchar ()) != '\n')
{
while (q >= 0 && pattern[q + 1] != text)
{
q = next[q];
}
if (pattern[q + 1] == text)
{
q ++;
}
if (q == len - 1)
{
q = next[q];
count ++;
}
}
return count;
}