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Solution_22.java
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34 lines (29 loc) · 813 Bytes
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package com.hilbert25.leetcode;
import java.util.ArrayList;
import java.util.List;
/**
* @author : hilbert25
* @version 创建时间：2017年3月12日 下午12:11:00 LeetCode com.hilbert25.leetcode
* Solution_22
*/
public class Solution_22 {
public static void main(String[] args) {
// TODO Auto-generated method stub
generateParenthesis(4);
}
public static List<String> generateParenthesis(int n) {
List<String> list = new ArrayList<String>();
search("", n, n, list);
return list;
}
public static void search(String add, int left, int right, List<String> list) {
if (left < 0 || right < 0 || left > right)
return;
if (left == 0 && right == 0) {
list.add(add);
return;
}
search(add + "(", left - 1, right, list);
search(add + ")", left, right - 1, list);
}
}