/in/Main.java:24: error: cannot find symbol
		return Long.parseInt(x, k);
		           ^
  symbol:   method parseInt(String,int)
  location: class Long
/in/Main.java:30: error: cannot find symbol
		if(s1.empty())return false;
		     ^
  symbol:   method empty()
  location: variable s1 of type String
2 errors