HDU 2203 亲和串 (想法题，字符串处理)

#include<iostream>
#include<sstream>
#include<vector>
#include<string>
#include<algorithm>
using namespace std;

int main()
{
string s1,s2;
while(cin>>s1)
{
cin>>s2;
s1=s1+s1;
int ans=s1.find(s2);
if(ans!=-1) cout<<"yes"<<endl;
else cout<<"no"<<endl;
}
return 0;
}