HDU 2203 亲和串 ---kmp

 

在字符串s1后再接上s1,形成新的字符串,再在s1中寻找是否有s2的子串,若有则为亲和串.

#include <iostream>
#include <cstring>
using namespace std;
#define maxn 100005
char a[maxn];
char b[maxn];
char c[maxn*2];
int main()
{
    while(cin>>a>>b)
    {
        strcpy(c,a);
        strcat(c,a);
        if(strstr(c,b)!=0)
            cout<<"yes"<<endl;
        else
            cout<<"no"<<endl;

    }
    return 0;
}