abcde a3 aaaaaa aa #
0 3
#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
#include <string>
#include <map>
#include <stack>
#include <vector>
#include <set>
#include <queue>
#pragma comment (linker,"/STACK:102400000,102400000")
#define maxn 1005
#define MAXN 2005
#define mod 1000000009
#define INF 0x3f3f3f3f
#define pi acos(-1.0)
#define eps 1e-6
typedef long long ll;
using namespace std;
char str[maxn],pstr[maxn];
int nextval[maxn];
void get_nextval()
{
int plen=strlen(pstr+1);
int i=1,j=0;
while (i<plen)
{
if (j==0||pstr[i]==pstr[j])
{
i++;
j++;
if (pstr[i]!=pstr[j])
nextval[i]=j;
else
nextval[i]=nextval[j];
}
else
j=nextval[j];
}
for (int i=1;i<=plen;i++)
printf("%d ",nextval[i]);
printf("\n");
}
int KMP()
{
int plen=strlen(pstr+1);
int len=strlen(str+1);
int i=0,j=0,ans=0;
while (i<=len)
{
if (j==0||str[i]==pstr[j])
{
if (j>=plen)
{
ans++;
j=0;
}
i++;
j++;
}
else
j=nextval[j];
}
return ans;
}
int main()
{
while (scanf("%s",str+1))
{
if (str[1]=='#')
break;
scanf("%s",pstr+1);
get_nextval();
printf("%d\n",KMP());
}
return 0;
}
原文:http://blog.csdn.net/u014422052/article/details/40212873