博客

import java.util.Scanner;
import java.util.Stack
public class Main {
	public static void main(String []args){
		Scanner sc =new Scanner(System.in);
		while(sc.hasNext()){
			int m =sc.nextInt();
			Stack<String> s  =new Stack<String>();
			String n ="";
			generate(m , m, n);
		}
	}		  
	public static void generate(int leftNum,int rightNum,String s)  
    {  
        if(leftNum==0&&rightNum==0)  
        {  
            System.out.println(s);  
        }  
        if(leftNum>0)  
        {  
            generate(leftNum-1,rightNum,s+'(');  
        }  
        if(rightNum>0&&leftNum<rightNum)  
        {  
            generate(leftNum,rightNum-1,s+')');  
        }  
	}  
}