int __tmain( )
{
    Solution solu;
    cout <<solu.FirstNotRepeatingChar("google") <<endl;
    
    return 0;
}
int main()
{
	string str = "solution";	

	Solution s =Solution();
	int index = s.FirstNotRepeatingChar(str);

	cout<<"the index of First not repeating char of "<<str<<" is "<<index<<endl;
}
int main(){
	Solution sol ;
	string str("google");
	cout << sol.FirstNotRepeatingChar(str) << endl;
	return 0;
}