摘要：
public List generateParenthesis(int n) { ArrayList result = new ArrayList(); dfs(result, "", n, n); return result; } /* left and right represents the remaining number of ( and ) that need... 阅读全文
摘要：
Given an array nums of n integers, are there elements a, b, c in nums such that a + b + c = 0? Find all unique triplets in the array which gives the s 阅读全文