【题解】 验证子串

#include<bits/stdc++.h>
using namespace std;
int main(){
	string s1,s2;
	getline(cin,s1);
	getline(cin,s2);
		if(s1.find(s2)!=-1){
			cout<<s2<<" is substring of "<<s1;
		}
		else if(s2.find(s1)!=-1){
			cout<<s1<<" is substring of "<<s2;
		}
		else{
			cout<<"No substring";
		} 
	
}