剪花布条---hdu2087（kmp模板）

题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=2087

kmp模板题：

#include <cstdio>
#include <cstring>
#include <iostream>
using namespace std;
#define N 1100

char s1[N], s2[N];
int p[N], L1, L2;

void Getp()
{
    int i=0, j=-1;
    p[0] = -1;
    while(i<L2)
    {
        if(j==-1 || s2[i]==s2[j])
        {
            i++;j++;
            p[i] = j;
        }
        else
            j = p[j];
    }
}

int kmp()
{
    int i=0, j=0, ans = 0;
    while(i<L1)
    {
        if(j==-1 || s1[i] == s2[j])
        {
            i++;
            j++;
        }
        else
        {
            j = p[j];
        }
        if(j==L2)
        {
            ans++;
            j=0;
        }
    }
    return ans;
}

int main()
{
    while(scanf("%s%s", s1, s2), strcmp(s1, "#"))
    {
        L1 = strlen(s1);
        L2 = strlen(s2);
        Getp();
        int ans = kmp();
        printf("%d
", ans);
    }
    return 0;
}

#include<iostream>
#include<stdio.h>
#include<algorithm>
#include<string.h>
#define N 2100
using namespace std;

int main()
{
    char s1[N],s2[N];
    int len1,len2,i,j,ans;
    while(scanf("%s",s1),strcmp(s1,"#"))
    {
        scanf("%s",s2);
        len2=strlen(s2);
        len1=strlen(s1);
        if(len1<len2)
        {
            printf("0
");
            continue;
        }
        else
        {
            ans=0;
            i=j=0;
            while(1)
            {
                if(s1[i]!=s2[j])
                    i++;
                while(s1[i]==s2[j]&&j<len2&&i<len1)
                {
                    i++;
                    j++;
                }
                if(j==len2)
                    ans++;
                if(i==len1)
                    break;
                j=0;
            }
            printf("%d
",ans);
        }
    }
    return 0;
}