#include <fstream>
#include <string>
using namespace std;
const size_t MISSING=basic_string<char>::npos;
int main(){
	cout<<string("Hi there\n").find("there")<<endl;
	cout<<string("Hi there\n").find("Hi")<<endl;
	cout<<string("Hi there\n").find("@")<<endl;
	if(string("Hi there\n").find("@")==MISSING)
	{
		cout<<"not there\n";
	}else{
		cout<<"found\n";
	}
}