shnya/C++ split: stringstream version

## C++ split: stringstream version
vector<string> split(const string &str, char delim){
  istringstream iss(str); string tmp; vector<string> res;
  while(getline(iss, tmp, delim)) res.push_back(tmp);
  return res;
}
	vector<string> split(const string &str, char delim){
	istringstream iss(str); string tmp; vector<string> res;
	while(getline(iss, tmp, delim)) res.push_back(tmp);
	return res;
	}