import antlr.*;
import antlr.collections.*;

public class Main1 {
       public static void main(String[] args) throws Exception {    
	          ExprLexer lexer = new ExprLexer(System.in);
		          ExprParser parser = new ExprParser(lexer);
			          parser.expr();
				          AST t = parser.getAST();
					          System.out.println(t.toStringTree());
						          ExprTreeParser treeParser = new ExprTreeParser();
							          int x = treeParser.expr(t);
								          System.out.println(x);
									      }    
}