19:字符串移位包含问题

AABCD CDAA

true

 1 #include<iostream>
 2 #include<cstring>
 3 #include<cstdio>
 4 #include<cmath>
 5 using namespace std;
 6 string a,b,c,d;
 7 int main()
 8 {
 9     cin>>a>>b;
10     c=a+a;
11     d=b+b;
12     if(c.find(b)!=-1&&b.size()<=a.size())
13     {
14         cout<<"true";
15         return 0;
16     }
17     if(d.find(a)!=-1&&a.size()<=b.size())
18     {
19         cout<<"true";
20         return 0;
21     }
22     cout<<"false";
23     return 0;
24 }